Erectile Dysfunction Treatment in 2026: The Complete Guide

This guide is the long version of that answer. It covers what ED is and is not, how common it really is at each age, what has to happen inside the body for an erection to occur and the many ways that chain can break, why cardiologists now treat ED as a warning sign, how a clinician works out the cause, every treatment class from the cheapest generic pill to surgery, what to do when the pills do not work, the specific situations of diabetes, heart disease and prostate surgery, and finally how to get treated online without being sold something unsafe. Each section stands on its own, so you can jump to the one you need; the sources are linked where the facts are stated, with the date we checked them.

Two things it is not. It is not medical advice: the prescribing decision belongs to a licensed clinician who knows your history, and nothing here should change what one has told you. And it is not a sales page: where we mention the providers we review, it is to point you to the review, which includes what their customers say, not to recommend a purchase.

The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) defines erectile dysfunction as a condition in which a man is unable to get or keep an erection firm enough for satisfactory sexual intercourse. The key word is persistent. Almost every man has an erection fail at some point, after too much alcohol, under stress, with a new partner or at the end of an exhausting week. That is not ED. ED is the pattern: a problem that recurs over weeks or months, in most attempts, and that gets in the way of a sex life you want to have. Source: NIDDK, erectile dysfunction definition and facts, checked October 27, 2026.

ED also takes more than one form, and the form carries information. The NIDDK's older patient publication described three: a total inability to achieve an erection, an inconsistent ability to do so, and a tendency to sustain only brief erections. A man who can get a firm erection on waking or by masturbation but not with a partner is telling a clinician something different from a man who has not had a firm erection of any kind in a year. The first pattern points toward a psychological or situational cause; the second points toward blood vessels, nerves or hormones. Source: NIDDK patient publication, archived copy, checked October 27, 2026.

It is worth separating ED from the things it gets lumped with. Low desire (low libido) is a different problem with different causes, often hormonal, relational or medication-related, and a man can have strong desire with ED or weak desire with perfectly good erections. Premature ejaculation is a timing problem, not an erection problem, though the two can travel together because anxiety feeds both. Peyronie's disease, a curvature of the penis from scar tissue, can make erections painful or unusable and is treated differently. And infertility has nothing to do with erections at all. A clinician who hears "I have ED" will usually spend the first few minutes finding out which of these you actually mean, because the treatment depends on it.

Is occasional trouble getting an erection ED?

No. A single failure, or an occasional one tied to an obvious cause, is normal physiology. The usual rule of thumb clinicians use is that erection problems in a substantial share of attempts for three months or more are worth evaluating, and sooner if they appeared suddenly, if you are under 40, or if you have diabetes, heart disease or another condition that affects blood vessels. Our guide to ED in your 20s and 30s covers the younger case in detail.

Much more common than the silence around it suggests, and far from confined to old age. The best-known prevalence figure comes from the Massachusetts Male Aging Study, a community-based random sample of men aged 40 to 70 surveyed between 1987 and 1989. It reported that 52% of men in that age range had some degree of erectile difficulty, counting minimal, moderate and complete cases together, and that complete erectile dysfunction roughly tripled across the range, from about 5% of men at 40 to about 15% at 70. Age was the strongest correlate, but heart disease, high blood pressure, diabetes and certain medications were each independently associated with it. Source: Feldman et al., Journal of Urology, 1994, abstract, checked October 27, 2026.

The NIDDK's patient publication, drawing on a 1993 National Institutes of Health consensus conference, put the number of American men affected at about 30 million, and gave age-specific figures for a total inability to get an erection: about 4% of men in their 50s, nearly 17% of men in their 60s, and 47% of men over 75. Those are decades-old estimates built on older definitions, and the current NIDDK page does not repeat the headline number, so treat them as the shape of the curve rather than a precise count. Source: NIDDK patient publication, archived copy, checked October 27, 2026.

Two points matter more than any single percentage. First, prevalence depends heavily on how ED is defined and measured, which is why surveys range widely; a question about "any difficulty" captures several times more men than a question about "never able to". Second, the NIDDK is explicit that ED is not an inevitable part of ageing. The association with age is real, but it runs largely through the conditions that accumulate with age, above all vascular disease, diabetes and the medications used to treat them. A healthy 70-year-old can have excellent erections; a 45-year-old with uncontrolled diabetes and a smoking habit may not. That is also why ED is treatable at any age. Source: NIDDK patient publication, archived copy, checked October 27, 2026.

Does ED get more common in younger men?

The surveys above did not sample men under 40, so there is no comparable figure for them, and claims of a "youth epidemic" are usually built on clinic samples or online polls rather than population studies. What is well documented is that younger men with ED are more likely to have a psychological or situational cause, and that the vascular causes seen in older men are less common but not absent, particularly with obesity, diabetes, smoking or heavy drinking. Our guide to ED in your 20s and 30s goes through the causes clinicians actually look for in that group.

An erection is a hydraulic event run by nerves and blood vessels, and understanding the sequence explains both why ED happens and why the drugs that treat it work the way they do. The NIDDK describes the mechanism in plain terms: sexual arousal, whether from touch, sight or thought, sends nerve signals to the penis. Those signals cause the smooth muscle in the two spongy chambers along its length, the corpora cavernosa, to relax, which lets arteries widen and blood rush in. As the chambers fill and expand, they press on the veins that would normally drain the penis, trapping the blood inside. That trapped, pressurised blood is the erection. When arousal ends, the smooth muscle contracts again, the veins reopen and the blood drains. Source: NIDDK, symptoms and causes, checked October 27, 2026.

The chemistry inside that sequence is where the pills act. Nerve endings and the lining of the blood vessels release nitric oxide, which triggers production of a messenger molecule called cyclic GMP inside the smooth muscle cells. Cyclic GMP is what tells the muscle to relax. An enzyme called phosphodiesterase type 5 (PDE5) breaks cyclic GMP down, ending the signal. Sildenafil, tadalafil, vardenafil and avanafil all work by blocking PDE5, so cyclic GMP lasts longer and the muscle stays relaxed; that is why the MedlinePlus monograph for each of them says the drug does not cause an erection by itself and only works with sexual stimulation. No nitric oxide, no cyclic GMP, nothing for the drug to protect. Source: MedlinePlus, sildenafil, checked October 27, 2026.

Every link in that chain is a place ED can start:

• The signal. Desire and arousal are generated in the brain. Depression, anxiety, stress, relationship conflict and some medications can suppress the signal before it leaves.
• The nerves. Diabetes, spinal injury, multiple sclerosis, pelvic surgery (especially prostate surgery) and some neurological diseases can damage the nerves that carry it.
• The arteries. Atherosclerosis, high blood pressure, high cholesterol, diabetes and smoking narrow or stiffen the small arteries of the penis, which are among the smallest in the body and therefore among the first to show damage.
• The muscle. The smooth muscle has to relax fully; scarring from Peyronie's disease or long periods without erections can impair it.
• The seal. If the veins do not close off properly, blood leaks out as fast as it comes in, a "venous leak" that produces erections that come but do not stay.
• The hormones. Testosterone supports desire and the tissue's responsiveness; very low levels can contribute, though it is one of several causes rather than the usual one.

Most men with ED have more than one weak link, and the links interact: a small vascular problem produces an unreliable erection, the unreliability produces anxiety, and the anxiety finishes the job. That is why the treatment conversation usually covers both the body and the mind even when the original cause was physical.

The NIDDK groups the causes into conditions, medications, psychological factors and lifestyle, and its list is a useful map because a clinician will walk through the same categories. Our separate guide to what causes erectile dysfunction covers each in more depth; this is the overview. Source for this section unless stated: NIDDK, symptoms and causes, checked October 27, 2026.

Conditions that affect blood flow or nerves

Type 2 diabetes, heart and blood vessel disease, atherosclerosis, high blood pressure, chronic kidney disease, multiple sclerosis, Peyronie's disease, injury from treatment for prostate cancer (surgery or radiation), injury to the penis, spinal cord, prostate, bladder or pelvis, and surgery for bladder cancer all appear on the NIDDK's list. Diabetes deserves its own mention: the NIDDK notes that high blood glucose over time damages both the small blood vessels and the nerves that erections depend on, and that men with diabetes tend to develop ED earlier and more severely than men without it. Our guide to ED and diabetes covers what that means for treatment. Source: NIDDK, diabetes, sexual and bladder problems, checked October 27, 2026.

Medications

The NIDDK lists blood pressure medicines, antiandrogens used in prostate cancer therapy, antidepressants, tranquillisers and prescription sedatives, appetite suppressants and ulcer medicines among the drugs that can cause or worsen ED. The practical point is that ED that begins within weeks of starting a new medicine is a reason to raise it with the prescriber, who can often switch to an alternative; it is not a reason to stop the medicine on your own. Our guide to ED pills and blood pressure medication covers the common overlap in detail.

Psychological and emotional factors

Fear of sexual failure, anxiety, depression, guilt about sexual performance or certain activities, low self-esteem and stress, whether about sex or about work and money, can all cause ED on their own or amplify a physical cause. The NIDDK makes the point that these are causes in their own right, not excuses, and that they are treatable with counselling, with medication, or both.

Lifestyle

Smoking, drinking too much alcohol, using illegal drugs, being overweight and not exercising are the NIDDK's four, and they overlap with the risk factors for the vascular disease that drives most physical ED. The reason they matter is not moral; it is that they are the causes you can change, and the Princeton IV consensus discussed below puts lifestyle at the top of its treatment priorities because improving them improves both erections and heart health.

Can ED be caused by porn or masturbation?

Neither appears on the NIDDK's list of causes, and there is no established diagnosis of "porn-induced ED". What clinicians do see is a pattern of situational ED: firm erections alone and difficulty with a partner, which is a performance-anxiety or conditioning problem and responds to the psychological approaches covered later in this guide, sometimes with a short course of medication to break the cycle.

The arteries that supply the penis are small, which makes them an early reporter of the same disease process, atherosclerosis, that later narrows the arteries of the heart. That observation has been formalised by a series of expert panels, most recently the fourth Princeton Consensus (Princeton IV), which met in 2023 and published its recommendations in 2024. Its central conclusion, in the words of its authors, is that ED is a strong, independent predictor of cardiac events, even after traditional risk factors such as cholesterol, diabetes and blood pressure are accounted for, and that it should be treated as a risk-enhancing factor when a man's cardiovascular risk is estimated. Source: Princeton IV consensus recommendations, Mayo Clinic Proceedings, 2024, abstract, checked October 27, 2026.

The practical recommendations that follow from it, as summarised by the American College of Cardiology, are that a sexual-function history should be part of the initial cardiovascular evaluation of every man, and that men with ED who sit at low to intermediate ten-year risk should be considered for a coronary artery calcium (CAC) scan to refine that estimate. The same summary reports an association between ED and a higher risk of heart attack; we have not verified the size of that estimate against the primary paper, so we report the direction and not the number. Source: American College of Cardiology, Princeton IV highlights, 2024, checked October 27, 2026.

Two further points from the consensus matter for anyone about to start treatment. The first is reassurance: sexual activity is a modest exertion, roughly equivalent to climbing two flights of stairs, and the panel considers it low added risk even for men with stable heart disease. A man who cannot manage that level of exertion without chest pain or breathlessness needs a cardiac assessment before any ED treatment, not because of the pills but because of what the symptoms mean. The second is the order of priorities: diet, exercise, weight loss and stopping smoking come first, because they improve erections and heart health together, and some heart medications, notably certain diuretics and beta-blockers, can worsen erections, which is a conversation to have with the prescriber rather than a reason to stop them. Source: Journal of Sexual Medicine, Princeton IV, PDE5 inhibitors and cardiac health, 2024, checked October 27, 2026.

The American Urological Association's guideline, discussed next, reaches the same place from the urology side: it recommends that men with ED be told about the relationship between ED and cardiovascular risk and be considered for assessment of that risk. For a man in his 40s or 50s whose only complaint is a less reliable erection, that single sentence can be the most valuable thing in this guide. Source: AUA erectile dysfunction guideline, checked October 27, 2026.

Diagnosis is mostly conversation. The NIDDK describes a clinician taking a medical and sexual history, asking about medications, performing a physical exam, and ordering lab tests as needed; imaging and specialist tests are reserved for specific situations. The American Urological Association's guideline frames the whole process as shared decision-making between a man and his clinician, and recommends that men presenting with symptoms of ED undergo a thorough medical, sexual and psychosocial history, a physical examination and selective laboratory testing. Sources: NIDDK; AUA guideline, checked October 27, 2026.

The history

Expect questions you may not have been asked before: when the problem started and whether it was sudden or gradual; whether you get erections on waking, during masturbation or with a partner; whether erections come but do not last; whether desire has changed; whether ejaculation or orgasm has changed; what is happening in your relationship and your life; what you drink, smoke or take; and every medication, including supplements. The pattern answers tell a clinician a great deal. Sudden onset with intact morning erections points to a psychological or situational cause. Gradual loss of firmness across all situations points to a vascular one. Loss of desire alongside it raises the question of hormones or mood. Many clinics use a short validated questionnaire, the International Index of Erectile Function (IIEF-5, sometimes called SHIM), to grade severity and track change; a five-question score is not a diagnosis, but it is a useful baseline.

The examination and tests

A physical exam checks blood pressure, pulses, the penis and testicles, and signs of hormonal or neurological disease. Blood tests are chosen to find causes that change management: blood glucose or HbA1c for diabetes, a lipid panel, and a morning total testosterone where low desire, small testicles or other symptoms suggest it. The AUA guideline recommends that men with ED and testosterone deficiency be offered testosterone therapy as part of their treatment, and that men be screened for testosterone deficiency where clinically indicated, which is why the testosterone test is common; our guide to whether low testosterone causes ED explains what the result means. Source: AUA guideline, checked October 27, 2026.

When specialist tests are used

For most men, no further testing is needed before a trial of treatment. Specialist tests, such as a penile duplex ultrasound with an injected vasodilator to measure blood flow, nocturnal erection monitoring, or a referral to a urologist, are used when the answer changes what will be done: in younger men with ED after pelvic trauma, when a venous leak is suspected, when surgery is being considered, or when Peyronie's disease needs assessment. A telehealth clinic cannot perform any of these, which is one of the honest limits of online care discussed later in this guide.

What an online intake can and cannot do

A good telehealth intake reproduces the history well: it asks the same questions in a structured form and flags the answers that need a human conversation. It cannot examine you, cannot take your blood pressure unless you report it, and cannot run bloods unless it arranges a lab. For a man with a textbook presentation, gradual onset, no red flags and a clean medication list, that is enough to prescribe safely. For a man with chest pain on exertion, a sudden onset after an injury, a curved or painful erection, or any of the red flags listed near the end of this guide, it is not, and a legitimate online clinic will say so and refer him on.

The American Urological Association's guideline changed how clinicians are taught to think about ED treatment. Rather than a fixed ladder (pills, then injections, then surgery), it states that men should be informed of all treatment options that are not contraindicated, regardless of invasiveness or irreversibility, as potential first-line treatments, and that the choice should be made through shared decision-making. In practice most men still start with an oral PDE5 inhibitor because it is effective, non-invasive and cheap as a generic, but the guideline's point is that a man who wants a definitive solution, or who cannot take the pills, does not have to "fail" each step before reaching the one that suits him. Source: AUA erectile dysfunction guideline, checked October 27, 2026.

The NIDDK's treatment page lists the same tools in plain language: lifestyle changes and counselling, oral medicines (the PDE5 inhibitors), testosterone where it is low, injectable medicines and urethral suppositories, vacuum devices and, for the minority who need it, surgery to implant a device. Source: NIDDK, treatment for erectile dysfunction, checked October 27, 2026.

Three principles run through everything that follows:

• Treat the cause where there is one. Uncontrolled diabetes, untreated high blood pressure, depression, a medication that causes ED, or very low testosterone each have their own treatment, and the erection problem often improves with it.
• Dose and technique matter as much as the drug. The AUA recommends that PDE5 inhibitor dosing be titrated to the optimal dose, and a large share of apparent "failures" are men who took the pill without stimulation, too soon, after a heavy meal, or at the starting dose only once.
• Safety is about interactions, not the drug class. The PDE5 inhibitors are well tolerated by most men; the serious risks come from combining them with nitrates or riociguat, or from using them with undiagnosed heart disease. That is why the prescription step exists.

How the categories compare at a glance is laid out in our guide to the best ED treatments compared; what each costs online is in the ED treatment cost index. The sections below go through them one at a time.

Every authority on ED starts here, and not as a polite preamble. The NIDDK's treatment page opens with lifestyle changes and counselling, and its list is specific: quitting smoking, limiting or stopping alcohol, increasing physical activity, maintaining a healthy weight, and stopping illegal drug use. The Princeton IV consensus puts diet, exercise, weight loss and smoking cessation at the top of its priorities for men with ED precisely because they improve erectile function and cardiovascular health at the same time. Sources: NIDDK, treatment, checked October 27, 2026; Journal of Sexual Medicine, Princeton IV, 2024, checked October 27, 2026.

The mechanism is the one described earlier: the arteries of the penis are small and respond quickly to the things that damage or protect the lining of blood vessels. Aerobic exercise improves the vessel lining's ability to release nitric oxide; stopping smoking removes a direct toxin to it; weight loss improves insulin resistance and testosterone; moderating alcohol removes a depressant of both the nervous signal and the blood supply. None of these works overnight, and a man with established vascular disease will usually need medication as well, but they are the only treatments on this page that also lengthen your life.

Managing the conditions behind it

For men with diabetes, the NIDDK is direct: managing blood glucose, blood pressure and cholesterol protects the blood vessels and nerves that erections depend on, and the same control that prevents eye and kidney complications slows the progression of ED. For men whose ED began with a medication, the fix is often a conversation with the prescriber about an alternative; the NIDDK lists several classes that can cause it, and in most of them a substitute exists. For men with depression or anxiety, treating the mood disorder frequently improves erections, though some antidepressants themselves affect sexual function, which is a known trade-off clinicians manage by choice of drug. Source: NIDDK, diabetes, sexual and bladder problems, checked October 27, 2026.

What lifestyle change cannot do

It cannot repair nerves cut during prostate surgery, it cannot reverse established scarring, and it cannot substitute for testosterone in a man whose level is genuinely deficient. It also cannot, on its own, break the anxiety cycle in a man whose ED is now psychological even if it began physically. Those men need the specific treatments that follow, often alongside lifestyle change rather than instead of it. For weight specifically, our weight-loss vertical covers the GLP-1 programmes now used for medically supervised weight loss; whether weight loss by any route improves a given man's erections depends on how much of his ED was vascular and metabolic in the first place, which is a question for his clinician.

These four drugs are the backbone of modern ED treatment, and the AUA guideline gives its strongest recommendation to informing men about them: men with ED should be informed regarding the treatment option of an FDA-approved oral PDE5 inhibitor, including discussion of benefits and risks, unless contraindicated (a Strong Recommendation on Grade B evidence). They share one mechanism, blocking the enzyme that ends the erection signal, and one absolute rule, no nitrates. They differ in how fast they start, how long they last, how food affects them and how they are dosed. The facts below are from the MedlinePlus monographs, which summarise each drug's FDA prescribing information. Source: AUA guideline, checked October 27, 2026.

Sildenafil (Viagra and generics)

The original, approved in 1998, and the cheapest as a generic. It is taken as needed, about one hour before sexual activity, anywhere from 30 minutes to 4 hours beforehand, and not more than once in 24 hours. A high-fat meal can delay when it starts working. It is also sold under the name Revatio at a different dose for pulmonary hypertension, and the two must not be confused. Our guides to how long sildenafil lasts and sildenafil doses cover the timing and the 25 mg, 50 mg and 100 mg strengths. Source: MedlinePlus, sildenafil, checked October 27, 2026.

Tadalafil (Cialis and generics)

The long-acting one. Taken as needed, its effect can last up to 36 hours, which is why it is sometimes called the weekend pill, and it is less affected by food than sildenafil. It is also the only one of the four with an approved once-daily low-dose regimen, taken at about the same time every day regardless of when sex happens, so that the drug is always present; the daily form is also approved for the urinary symptoms of an enlarged prostate, which makes it a natural choice for men who have both. Our guide to daily versus as-needed tadalafil sets out who suits which, and sildenafil vs tadalafil compares the two head to head. Source: MedlinePlus, tadalafil, checked October 27, 2026.

Vardenafil (Levitra, Staxyn and generics)

Pharmacologically close to sildenafil, taken as needed about an hour before sexual activity and not more than once a day. It comes as a conventional tablet and, as Staxyn, a rapidly disintegrating tablet that dissolves on the tongue; MedlinePlus notes the two forms are not interchangeable and that the disintegrating tablet contains aspartame and sorbitol, which matters to men with phenylketonuria or sorbitol intolerance. Its monograph also flags long QT syndrome as a condition to raise with the prescriber, a heart-rhythm consideration specific to this drug. Source: MedlinePlus, vardenafil, checked October 27, 2026.

Avanafil (Stendra)

The newest and fastest. The 100 mg and 200 mg doses are generally taken about 15 minutes before sexual activity and the 50 mg dose about 30 minutes before, not more than once in 24 hours. It has no generic in the United States as of our check, which is why it is rarely the cheapest option, but for men who value spontaneity over cost it is the one designed for it. Source: MedlinePlus, avanafil, checked October 27, 2026.

How well do they work?

Well, for most men, and roughly equally. A meta-analysis of placebo-controlled trials of sildenafil published in the Archives of Internal Medicine in 2002 reported improved erections in 65% to 82% of men on sildenafil across 21 randomised trials, against 18% to 26% on placebo, with a number needed to treat of about 1.7 for global improvement. A later systematic review comparing the published trials of sildenafil, tadalafil and vardenafil found similar rates of improved erections, around 71% to 76%, against 22% to 24% on placebo. Those are trial populations, and response is lower in men with diabetes or nerve damage after prostate surgery and higher in men with a psychological cause, a point the section on what to do when the pills fail returns to. Sources: Fink et al., Archives of Internal Medicine, 2002, checked October 27, 2026; systematic review of PDE5 inhibitor trials, BMJ, 2005, checked October 27, 2026.

There is no single best pill, only the best match for how you live. The table summarises what the MedlinePlus monographs say about timing and dosing; the prescriber makes the actual choice and sets the dose. Sources: MedlinePlus monographs for sildenafil, tadalafil, vardenafil and avanafil, checked October 27, 2026.

Questions that usually decide it

• Do you plan, or prefer not to? As-needed sildenafil, vardenafil or tadalafil suits men who can take a tablet an hour ahead. Daily tadalafil suits men who want sex to be unplanned, or who are active more than about twice a week. Avanafil suits men who want the shortest lead time.
• Do you also have urinary symptoms from an enlarged prostate? Daily tadalafil is approved for both, which can mean one prescription instead of two.
• Is cost the constraint? Generic sildenafil and tadalafil are, at the prices in our index, the least expensive prescription ED treatments by a wide margin; see the cost index for the figures and sources.
• Do you eat late? Sildenafil and vardenafil are slowed by a heavy meal; tadalafil and avanafil are not, or much less so.
• Did one not work? Switching within the class is reasonable after a fair trial at the right dose, but the first step is usually checking dose and technique, covered below.

Our guide to the best ED medicine goes through the same decision with more worked examples.

Most men tolerate PDE5 inhibitors well, and the common side effects are the predictable results of a drug that widens blood vessels: headache, facial flushing, nasal congestion, indigestion, and for sildenafil and vardenafil a temporary blue tinge or increased light sensitivity in vision; tadalafil more often causes back or muscle ache. These are usually mild and short-lived and often ease at a lower dose. Our guide to ED medication side effects covers them one by one. The rest of this section is about the uncommon but serious problems, which are where the prescription safeguard earns its keep. Source: MedlinePlus, sildenafil, checked October 27, 2026.

Nitrates and riociguat: never together

The Viagra prescribing information lists three contraindications: nitric oxide donors such as organic nitrates and nitrites, known hypersensitivity, and guanylate cyclase stimulators such as riociguat (Adempas). The reason is simple chemistry: nitrates and riociguat raise cyclic GMP from the other end of the same pathway the PDE5 inhibitor protects, and the combination can drop blood pressure to a dangerous level. Nitrates include nitroglycerin tablets, sprays and patches for angina, isosorbide mononitrate and dinitrate, and the recreational "poppers" (amyl or butyl nitrite). The same contraindication appears in the monographs for all four drugs. Sources: Viagra prescribing information, Pfizer, checked October 27, 2026; MedlinePlus, avanafil, checked October 27, 2026.

Alpha-blockers and blood pressure medicines: caution

Alpha-blockers, used for an enlarged prostate (tamsulosin, alfuzosin, doxazosin) and sometimes for blood pressure, also lower blood pressure, and the Viagra label advises caution when the two are combined because the combination may lead to hypotension; the AUA's summary of the labels notes that tadalafil and vardenafil at any dose, and sildenafil at 50 mg and 100 mg, call for care with alpha-blockers. This is a dose-and-timing problem a prescriber manages, not an absolute bar, and it is one of the most common reasons an online intake asks for your full medication list. Our guide to ED pills and blood pressure medication explains which combinations are safe. Sources: Viagra prescribing information, checked October 27, 2026; AUA guideline, checked October 27, 2026.

Vision, hearing and prolonged erection

Three rare events require stopping the drug and seeking care immediately. A sudden loss of vision in one or both eyes can be a sign of non-arteritic anterior ischaemic optic neuropathy (NAION), and the label says to use the drug with caution in men with a history of it or a "crowded" optic disc. A sudden decrease or loss of hearing, with or without ringing or dizziness, has also been reported. And an erection lasting more than four hours (priapism) can permanently damage the penis if not treated; it is an emergency-department problem, not something to wait out. The monographs for all four drugs carry the same three warnings. Sources: Viagra prescribing information, checked October 27, 2026; MedlinePlus, vardenafil, checked October 27, 2026.

Heart disease

The drugs themselves are not the hazard for most men with heart disease; the exertion of sex is, and the Princeton IV consensus considers that exertion low risk for men with stable disease who can climb two flights of stairs without symptoms. The men who should not be prescribed a PDE5 inhibitor by an online intake are those with unstable angina, a recent heart attack or stroke, uncontrolled blood pressure or heart failure, or any symptoms on exertion; they need a cardiologist's clearance first. Source: Journal of Sexual Medicine, Princeton IV, 2024, checked October 27, 2026.

Between a fifth and a third of men in the trials did not get a satisfactory response, and in everyday practice the share who report "it didn't work" is higher, because a trial administers the drug correctly and real life does not. The AUA guideline's recommendation that dosing be titrated to the optimal dose is the starting point: a man who tried 25 mg of sildenafil twice is not a non-responder. Before changing anything, a clinician will check the following. Source: AUA guideline, checked October 27, 2026.

• Was there sexual stimulation? None of the four drugs produces an erection on its own; the MedlinePlus monographs state this for each. Taking the tablet and waiting is the most common error.
• Was the timing right? Sildenafil and vardenafil need about an hour and are slowed by a heavy meal; a tablet taken with a large dinner and attempted twenty minutes later has not been tested.
• Was the dose adequate? The starting dose is a starting dose. The label for each drug allows an increase, within its maximum, if the response is inadequate and the drug is tolerated.
• How many attempts? Clinicians generally want several attempts at the right dose, with stimulation and correct timing, before calling a drug a failure, because anxiety on the first occasions can sink an otherwise effective tablet.
• Is a cause being missed? Uncontrolled diabetes, very low testosterone, a new medication, heavy drinking or untreated depression can each blunt the response. The AUA recommends that men with ED and testosterone deficiency be offered testosterone therapy, because the pills work better when the hormone is adequate.

Then: switch, combine, or move to the next class

If the drug was used correctly at a full dose and still did not work, the options are a different PDE5 inhibitor (a minority of men respond to one and not another), daily tadalafil to keep the drug continuously present, a PDE5 inhibitor combined with a vacuum device, or a move to the injectable and intraurethral treatments described next, which bypass the nerve signal altogether and work in most men for whom the pills do not. For men whose ED is psychological, the better next step is often counselling rather than a stronger drug, covered later in this guide. The men least likely to respond to pills are those whose nerves were damaged by prostate surgery and those with long-standing diabetes; for them, the AUA's "all options are first-line" principle means it is reasonable to go straight to injections or to discuss an implant rather than cycling through tablets. Source for response patterns: systematic review of PDE5 inhibitor trials, BMJ, 2005, checked October 27, 2026.

A growing share of the ED market, and most of the advertising, is for compounded products: dissolvable tablets or troches that combine a PDE5 inhibitor with other active ingredients, marketed as "4-in-1" or "multi-ingredient" treatments. Quad by MEDVi, the anchor product of the provider that tops our ranking, is one; our guide to the best 4-in-1 ED medications compares the category and our Quad by MEDVi review covers that product in detail. This section is about what "compounded" means, because it is the single most misunderstood word in the category.

Compounded drugs are not FDA-approved

The FDA's own consumer page states it plainly: compounded drugs are not FDA-approved, which means the agency does not review them before they are marketed to evaluate their safety or effectiveness. Compounding is legal and serves a real purpose, the FDA notes, for patients who cannot be treated with an approved product, such as someone allergic to a dye or unable to swallow a tablet. But the agency also warns that poor compounding practices can result in contamination or a product with the wrong strength or purity, and that consumers who buy compounded drugs online, including through telehealth platforms, may not know the identity of the compounder that made the drug. Source: FDA, human drug compounding, consumer information, checked October 27, 2026.

What that means in practice

The active ingredients in a compounded ED tablet are usually approved drugs, often sildenafil or tadalafil, sometimes combined with others. The combination, the dose and the dissolvable format are what has not been through the approval process. Three consequences follow for a buyer:

• The interaction rules do not change. A compounded tablet containing a PDE5 inhibitor carries the same nitrate and riociguat contraindication as Viagra, whatever else is in it.
• The evidence is for the ingredients, not the product. The trials summarised above tested sildenafil and tadalafil as single tablets. A specific blend at a specific dose in a specific format has not been tested in the same way, so a claim that it works "better" than the generics is a claim, not a finding.
• The pharmacy matters. The FDA's warning about not knowing the compounder is the reason our provider reviews check which pharmacy a telehealth service uses, whether it is state-licensed, and whether the provider names it.

None of this makes compounded ED medication a bad choice. For a man who wants a dissolvable format, who gets side effects at the doses in the standard tablets, or who prefers a single product over two prescriptions, it may be the right one, and the providers we review prescribe it through licensed clinicians and licensed pharmacies. It does mean the honest comparison is "a legitimately prescribed compounded product versus an approved generic," not "a premium product versus a basic one." The cost index puts the two side by side.

When pills fail or cannot be used, the next class works by a different route. Alprostadil is a synthetic form of prostaglandin E1, a vasodilator, and it is delivered directly to the penis rather than through the bloodstream, so it does not depend on the nerve signal the PDE5 inhibitors protect. The NIDDK describes injectable medicines and suppositories that cause a quick, automatic erection by increasing blood flow to the penis, and notes that the clinician teaches the man how to inject or insert them himself. Source: NIDDK, treatment, checked October 27, 2026.

Injection (Caverject, Edex)

A fine needle delivers alprostadil into the side of the penis a few minutes before sex. The MedlinePlus monograph covering the urogenital forms sets the limits: the injection should not be used more than three times a week, with at least 24 hours between uses. The first dose is given in a clinic so the clinician can find the right amount and check for a prolonged erection; after that it is self-administered. The erection does not need sexual stimulation to begin, which is both its strength and, for some men, its oddness. Source: MedlinePlus, alprostadil urogenital, checked October 27, 2026.

Trimix and other compounded injections

Trimix is a compounded injection combining alprostadil with papaverine and phentolamine, two other vasodilators, in doses a prescriber sets for the individual man. It is widely used, particularly after prostate surgery, because the combination can work where alprostadil alone does not and often at a lower dose of each, with less of the aching that alprostadil alone can cause. Everything said above about compounded products applies: it is not FDA-approved as a product, its quality depends on the pharmacy, and it requires a clinician's supervision, not an online cart. Our guide to Trimix for ED covers how it is started and what it costs.

The urethral pellet (MUSE)

A small alprostadil pellet is inserted into the urethra with an applicator, where it dissolves and is absorbed into the surrounding tissue. The monograph limits it to no more than two uses in 24 hours. It avoids the needle, which some men cannot face, at the price of a less reliable response and, commonly, a burning or aching sensation. Source: MedlinePlus, alprostadil urogenital, checked October 27, 2026.

Who these suit

Men for whom pills are contraindicated (notably those on nitrates), men with nerve damage after prostate surgery or from diabetes, and men who tried the pills correctly and did not respond. The main risks are a prolonged erection, which is why dosing is established in clinic, pain at the injection site, and over time scarring at repeated injection sites, which is managed by rotating them. Injections are, for many men, the most effective treatment short of an implant, and the AUA's principle that all non-contraindicated options may be first-line means a man who would rather inject than take a daily tablet is entitled to that choice.

The mechanical options are old, unglamorous and, in their place, excellent. The NIDDK's treatment page covers both: a vacuum device pulls blood into the penis to produce an erection, with a band placed at the base to hold it; side effects can include a cold or numb feeling in the penis and bruising, which is usually painless and fades in a few days. For surgery, the NIDDK notes that most men with ED do not need it, and that if other options fail a man and his clinician may consider implanting a device. Source: NIDDK, treatment, checked October 27, 2026.

Vacuum erection devices

A clear cylinder is placed over the penis, a hand or battery pump draws the air out, blood is pulled in, and a constriction ring is slid onto the base before the cylinder is removed. The ring should not stay on for longer than the device instructions allow. A vacuum device has no drug interactions, which makes it an option for men on nitrates, and Mayo Clinic notes it can be combined with medication or used alongside an implant. Its drawbacks are the lack of spontaneity, the cool, slightly dusky erection the ring produces, and the fact that the penis pivots at the ring rather than at the body. For a couple willing to build it into their routine, it is reliable and, after the initial purchase, free.

Penile implants

An implant is surgery to place either a pair of inflatable cylinders in the corpora cavernosa, connected to a pump in the scrotum and a fluid reservoir in the abdomen, or a pair of malleable (bendable) rods. The inflatable type produces an erection on demand that looks and feels natural and a flaccid state when deflated; the malleable type is simpler and always firm but has to be bent into position. Implants are the definitive treatment: once in place, no other ED treatment is needed or possible, since the natural erectile tissue is replaced. The reported satisfaction rates in the urology literature are high, the main risks are infection and mechanical failure over the years, and the decision is irreversible, which is why Mayo Clinic lists it among the options for men who respond poorly to oral medications rather than as a first step. Source: Mayo Clinic, erectile dysfunction care, checked October 27, 2026.

Vascular surgery

Operations to repair arteries or tie off leaking veins were once common. The AUA guideline does not recommend penile venous surgery, and arterial reconstruction is reserved for the rare young man with a discrete arterial injury, typically after pelvic trauma, confirmed on imaging. For almost everyone else, the surgical option is the implant. Source: AUA guideline, checked October 27, 2026.

Testosterone is the hormone men most often blame first, and it is usually not the cause. It supports sexual desire and the responsiveness of the erectile tissue, and very low levels can contribute to ED, but the NIDDK lists it as one cause among many and most men with ED have normal testosterone. Where it is low, the NIDDK's treatment page includes testosterone therapy, given as an oral medicine, a patch or a gel (and, in practice, injections), among the treatments; the AUA guideline recommends that men with ED and testosterone deficiency be offered testosterone therapy as part of their treatment. Sources: NIDDK, treatment, checked October 27, 2026; AUA guideline, checked October 27, 2026.

The practical sequence is a blood test before any treatment. Testosterone is measured in the morning, when it peaks, and a single low reading is usually repeated before a diagnosis of deficiency is made, because levels vary day to day and fall with illness, poor sleep and obesity. A man with ED and a normal testosterone level will not benefit from testosterone, and taking it without a deficiency carries its own risks, including suppression of the body's own production and of fertility. A man with ED, low desire and a confirmed low level may find that replacing the hormone improves desire, energy and the response to PDE5 inhibitors; it less often fixes the erection by itself, which is why the two are frequently combined.

Our guide to whether low testosterone causes ED explains what the test results mean, and our testosterone replacement therapy vertical reviews the online clinics that test and treat it, several of which, including Peter MD and DudeMeds, also appear in our ED reviews because they treat both.

Everything in this section is sold for ED and none of it is a recommended treatment. The distinction between investigational, experimental and fraudulent matters, so this takes them in turn.

Low-intensity shockwave therapy

Low-intensity extracorporeal shockwave therapy (LI-ESWT, often marketed under brand names) applies acoustic pulses to the penis over several sessions with the aim of stimulating new blood vessel growth. The AUA guideline states that for men with ED, low-intensity shockwave therapy should be considered investigational (a Conditional Recommendation on Grade C evidence), because the findings from randomised sham-controlled trials did not clearly show that benefits outweigh risks and burdens. A 2019 review of the guidelines noted that European guidance is more permissive, allowing it with a weak recommendation in mild vascular ED or in poor responders to pills. The honest summary is that it is plausible, under study, not dangerous, and sold at prices that assume a certainty the evidence does not provide. Sources: AUA guideline, checked October 27, 2026; International Journal of Impotence Research, guideline review, 2019, checked October 27, 2026.

Platelet-rich plasma and stem cells

The AUA is firmer here. Intracavernosal stem cell therapy should be considered investigational, and platelet-rich plasma (PRP) is labelled experimental and, in the guideline's words, should not be offered to men with ED unless it is administered in the context of an institutional review board-approved clinical research protocol. A clinic selling a "P-shot" for a fee is not running a research protocol. Source: AUA guideline, checked October 27, 2026.

Supplements and over-the-counter pills

There is no over-the-counter drug approved for ED in the United States. Products sold as supplements for sexual enhancement fall into two groups. The first is herbal and amino-acid products (L-arginine, ginseng, yohimbe, horny goat weed, maca) with weak or no evidence and, in yohimbe's case, real side effects. The second is more dangerous: the FDA maintains a list of tainted sexual enhancement products, sold online and in convenience stores, that laboratory testing found to contain undeclared sildenafil, tadalafil or related compounds, sometimes at doses above the approved maximum. A man on nitrates who takes one of these believing it is herbal has taken a contraindicated drug without knowing it. Our guide to over-the-counter ED pills covers both groups; the FDA's list is the reference. Sources: FDA, tainted sexual enhancement and energy products, checked October 27, 2026; FDA, hidden risks of ED treatments sold online, checked October 27, 2026.

How to read a claim

Three questions sort most of this market. Is the product FDA-approved for ED? (Only the four PDE5 inhibitors, alprostadil products and implants are.) If not, is it a compounded version of an approved drug prescribed by a licensed clinician and made by a licensed pharmacy? (Legitimate, with the caveats above.) If neither, what is the evidence, and who is selling it? A treatment with no approval, no prescription and a testimonial-driven website is, in the AUA's framework, either investigational, experimental or fraudulent, and the price does not tell you which.

The NIDDK lists fear of sexual failure, anxiety, depression, guilt, low self-esteem and stress among the causes of ED, and counselling among the treatments, alongside and not beneath the medicines. In a man under 40 with sudden onset, intact morning erections and a problem that appears only with a partner, the psychological cause is the likely one. In an older man with a vascular cause, anxiety is almost always layered on top of it by the second or third failure. Either way, the mind is part of the treatment. Source: NIDDK, symptoms and causes, checked October 27, 2026.

The performance-anxiety loop

The mechanism is physiological, not a weakness. Anxiety activates the sympathetic nervous system, the fight-or-flight branch, which constricts blood vessels and contracts the smooth muscle that has to relax for an erection. Watching for the erection to fail is itself a sympathetic state. A man who has had two failures approaches the third already in the state that guarantees it. Breaking the loop is the goal of treatment, and there are three ways in.

• A short course of medication. A PDE5 inhibitor taken for a few occasions can give the body the experience of reliable erections, which removes the expectation of failure; many men then stop it. This is one of the better-evidenced uses of the pills in psychological ED, where trial response rates are highest.
• Sex therapy and sensate focus. A structured programme, usually with a partner, that takes intercourse off the table for a period and rebuilds physical intimacy in stages without the goal that creates the anxiety. It is the standard psychological treatment and can be delivered by a certified sex therapist in person or online.
• Treating what sits underneath. Depression, generalised anxiety, relationship conflict and, in some men, a history of sexual trauma each respond to their own treatment, and the ED often improves with it.

Telehealth and the psychological case

The online ED clinics we review are built around prescribing, and a man whose problem is anxiety will usually be offered a tablet. That is not wrong, for the reason given above, but it is incomplete, and a clinic that never mentions counselling is treating half the problem. Our online therapy vertical reviews the platforms that provide licensed therapists, several of which list sex therapy among their specialities. For the specific situation of younger men, our guide to ED in your 20s and 30s covers what to raise with a clinician and what not to assume.

Three groups of men account for a large share of ED, respond differently to treatment, and deserve their own paragraphs.

Diabetes

The NIDDK explains that high blood glucose over time damages the small blood vessels and the nerves that erections depend on, so men with diabetes develop ED more often, earlier and often more severely than men without it. The treatment options are the same, but the response to pills is lower on average, the threshold for moving to injections is reached sooner, and the single most useful intervention is control of glucose, blood pressure and cholesterol, which slows the damage. A man with diabetes should also expect his clinician to ask about low testosterone, which is more common in type 2 diabetes, and about the nerve and circulation symptoms that travel with it. Our guide to ED and diabetes covers the specifics. Source: NIDDK, diabetes, sexual and bladder problems, checked October 27, 2026.

Heart disease and blood pressure

For a man with known heart disease the questions are the Princeton IV questions: is the disease stable, can he manage the exertion of two flights of stairs without symptoms, and is he taking a nitrate? If the disease is stable, the exertion is fine and there is no nitrate, the PDE5 inhibitors are usually appropriate and the consensus treats their cardiac safety as established. If he is on a nitrate, the pills are out and the choice is a vacuum device, alprostadil or, after a cardiology conversation, a change of angina treatment. If blood pressure is uncontrolled or symptoms occur on exertion, treatment waits for the cardiologist. Blood pressure medicines themselves are a common contributor; our guide to ED pills and blood pressure medication explains which combinations are managed and which are forbidden. Source: Journal of Sexual Medicine, Princeton IV, 2024, checked October 27, 2026.

After prostate surgery or radiation

Radical prostatectomy and pelvic radiation injure the nerves that run alongside the prostate, and ED afterwards is expected rather than exceptional. The published rates vary enormously, from under a fifth to nearly all men, depending on whether the nerves could be spared, the surgeon's experience and the man's function beforehand. Johns Hopkins tells its patients that erection recovery sufficient for intercourse is regained by most men, with or without oral PDE5 inhibitors, within about two years, and that erectile recovery lags behind other functional recovery; a review of the literature puts natural recovery at up to 24 months, with pre-operative function and nerve sparing as the main predictors. During that period the pills often work poorly because the nerve signal they depend on is damaged, which is why many urologists use "penile rehabilitation" protocols combining daily tadalafil, a vacuum device or alprostadil injections to keep the tissue oxygenated while the nerves recover. A man in this situation should be under a urologist rather than an online clinic, and should know that the injection route is the one most likely to work in the meantime. Sources: Johns Hopkins Medicine, erectile dysfunction after prostate cancer, checked October 27, 2026; Erectile dysfunction post-radical prostatectomy, review, 2017, checked October 27, 2026.

Online treatment of ED is now mainstream, and for the straightforward case it is safe, discreet and quick. The FDA's own guidance on buying medicines online, BeSafeRx, sets the standard a legitimate service meets: it requires a valid prescription, it is licensed by a state board of pharmacy, it has a US-licensed pharmacist available to answer questions, and it provides a US address and phone number. Any ED site that will sell you sildenafil with no prescription has failed the first test and is, by definition, operating illegally. Source: FDA, BeSafeRx, checked October 27, 2026.

The four steps

1. Online intake. A structured questionnaire covering your symptoms, the pattern described in the diagnosis section, your full medical history and every medication and supplement. The nitrate question is the one that cannot be skipped. A good intake also asks about chest pain on exertion, blood pressure, vision problems and, increasingly, a photo ID for identity verification.
2. Clinician review. A licensed clinician in your state reviews the intake, asks follow-up questions by message or video, and decides whether a prescription is appropriate, which drug and which dose. Some states require a video or phone consultation before a first prescription; a legitimate service follows its state's rule rather than routing around it.
3. The prescription and the pharmacy. If appropriate, the clinician writes a prescription that is filled by a licensed pharmacy, either the service's partner pharmacy or, with many services, one of your choosing. For compounded products the pharmacy is a compounding pharmacy, and the FDA's caution about knowing who the compounder is applies.
4. Delivery and follow-up. Discreet shipping, then a check-in on response and side effects, with dose adjustment if needed. The follow-up is where good and poor services separate: a dose that is not working should be easy to raise with the same clinician.

Our guide to how to get ED treatment online walks through the process at the providers we review, and how to buy ED medication online safely turns the FDA checklist into questions you can ask a site.

What online care cannot do, honestly

It cannot examine you, so a curved or painful erection, a lump, or a testicular problem needs a clinic. It cannot run blood tests unless it arranges them, so a man who needs a testosterone or glucose check may be sent to a lab or asked to supply results. It cannot teach you to self-inject alprostadil, which is why the injectable route starts in person. And it cannot see what you look like climbing stairs, so a man with cardiac symptoms needs a cardiologist before any online clinic should prescribe. The FDA's consumer update on the hidden risks of ED treatments sold online is worth reading for the other failure mode: products that are not what they claim. Source: FDA, hidden risks of ED treatments sold online, checked October 27, 2026.

This guide deliberately contains no prices, because prices change and a figure typed into a 12,000-word article is a figure that will be wrong within months. The numbers live in one place, our ED treatment cost index, which prices every route, generic pills, brand-name pills, compounded multi-ingredient formulas, nasal spray and injectables, per dose and per month, with the source of each figure labelled on its row and the date it was checked. What this section can do is explain the structure of the costs, which does not change.

• The drug is the smallest part for generics. Generic sildenafil and tadalafil are inexpensive per tablet; the cost of getting them online is mostly the consultation and any membership fee, which is why the same tablet can cost several times more at one service than another.
• Compounded products cost more per dose and bundle the consultation. A multi-ingredient dissolvable from a telehealth service is typically priced as a monthly subscription that includes the clinician review and shipping. Whether that is good value depends on whether you wanted the format and the bundle, not on the tablet.
• Brand-name pills cost most and buy nothing clinically over the generic with the same active ingredient, except where a man prefers a specific formulation or a generic is not available (avanafil).
• Injections carry setup costs for the in-person visit and supplies, then a per-dose cost that depends on the pharmacy; Trimix pricing varies widely between compounding pharmacies.
• Insurance rarely helps. Most US insurance plans exclude ED medication or limit the quantity, which is why the cash price is the price that matters and why the index is built on cash prices.

Our guide to how much ED treatment costs works through the arithmetic of a year on each route, with the index's figures, and the alternatives to Viagra and Cialis guide covers the generic-versus-brand decision.

We review seven online ED providers and compare them head to head; the ranking is on our ED treatment comparison page and every review is linked from it. The checks below are the ones the reviews apply, and the ones worth applying yourself to any service we have not covered.

1. Is a licensed clinician making the decision? The service should state that a licensed clinician in your state reviews every intake and should not promise a prescription before anyone has read it. "Get your meds in minutes" is a marketing line; "a clinician will review your intake within 24 hours" is a process.
2. Which pharmacy, and is it licensed? The FDA's warning about anonymous compounders is the reason to ask. A legitimate service names its pharmacy or lets you choose one, and the pharmacy is licensed in the state it ships to.
3. What exactly is in the product? For a compounded product, the active ingredients and their doses should be stated before you buy, not revealed on the label. "Proprietary blend" is a reason to walk away.
4. What does the price include, and what happens at renewal? Consultation, medication, shipping and follow-up should be itemised. Subscription terms, cancellation and refund policy should be findable before checkout. Several of the complaints in the customer reviews we transcribe for other verticals are about renewals and refunds, not medicine.
5. How is follow-up handled? Can you message the same clinician, and does a dose change cost a new consultation? A service that makes a dose increase easy is a service that expects to be used correctly.
6. Does it say no? A legitimate intake declines some men: those on nitrates, those with cardiac symptoms, those whose answers need an in-person exam. A service that has never declined anyone is not screening.
7. What do its customers say, and where? We read public reviews on the provider's own Trustpilot profile and quote them verbatim on the review pages where we hold them; for the ED providers we have captured reviews for Hims and BraveRX. A pattern of complaints about shipping and billing tells you more than the star rating.

Our head-to-head pages, for example Quad by MEDVi vs Hims and Hims vs DudeMeds, apply these checks to two providers at a time, and ED treatment near you vs online covers when a local clinic is the better choice.

Most ED can be handled by a primary-care clinician or a telehealth service. Some of it cannot, and some symptoms are not ED at all. See someone in person, promptly, for any of the following:

• An erection lasting more than four hours, with or without a drug. This is priapism and it is an emergency: go to an emergency department. Source: MedlinePlus, sildenafil, checked October 27, 2026.
• Sudden loss or decrease of vision or hearing after taking a PDE5 inhibitor. Stop the drug and seek care the same day. Source: Viagra prescribing information, checked October 27, 2026.
• Chest pain, breathlessness or dizziness during sex or exertion. This is a cardiac symptom first and an ED question second, and it needs a cardiologist before any ED treatment. Source: Princeton IV, Journal of Sexual Medicine, 2024, checked October 27, 2026.
• A curved, painful or lumpy erection. Peyronie's disease needs examination and has its own treatments; a telehealth intake cannot assess it.
• ED after an injury to the pelvis, perineum or spine, which can indicate an arterial or nerve injury that imaging may identify and surgery may repair.
• ED under 40 with no obvious cause, particularly with other symptoms such as fatigue, low desire or loss of body hair, which can point to a hormonal or neurological problem worth finding early.
• ED with urinary symptoms, blood in the urine or semen, or a testicular lump. These need an examination regardless of the erection problem.
• Any ED in a man with known heart disease, uncontrolled blood pressure, or on a nitrate. Treatment is still possible, but the plan needs a clinician who can see the whole picture.

None of these is a reason to delay; the opposite. The NIDDK's point that ED is treatable at any age applies to the difficult cases as much as the easy ones, and the sooner the cause is found the more options remain.

Sometimes, and it depends on the cause. ED from a medication usually resolves when the medication is changed. ED from performance anxiety can resolve completely once the loop is broken. ED from an acute illness, heavy drinking or a period of depression often recovers with the underlying condition. ED from low testosterone improves when the hormone is replaced, though replacement is ongoing rather than curative. ED after prostate surgery recovers in most men over up to two years, as the Johns Hopkins and review figures above describe, though not always to the previous level.

ED from vascular disease, diabetes or nerve damage is managed rather than cured: the treatments work for as long as they are used, and lifestyle change slows the progression of the cause without reversing it. That is the ordinary situation for most men over 50 with ED, and it is not a bleak one, because the management is effective, cheap and compatible with a full sex life for decades. The one treatment that ends the problem permanently is an implant, which is also the one that cannot be undone. Source: Johns Hopkins Medicine, erectile dysfunction after prostate cancer, checked October 27, 2026.

Tadalafil has an approved once-daily regimen at a lower dose, taken at about the same time each day, and that is the only one of the four designed for daily use; the MedlinePlus monograph describes it. Sildenafil, vardenafil and avanafil are as-needed drugs with a limit of one dose in 24 hours, so a man who has sex daily could take one daily, but the label does not describe a continuous low-dose regimen for them. Daily tadalafil is also the form approved for the urinary symptoms of an enlarged prostate. Whether daily dosing is right for a particular man, and at what dose, is the prescriber's decision; our guide to daily versus as-needed tadalafil sets out the trade-offs. Source: MedlinePlus, tadalafil, checked October 27, 2026.

Situational ED often does: the failure that followed a bad week does not recur when the week ends. Persistent ED, the pattern over months, rarely does, because its causes, vascular disease, diabetes, nerve damage, hormonal deficiency or an entrenched anxiety loop, do not resolve without being addressed. Waiting also costs something specific: each failure strengthens the anxiety that makes the next one likelier, and in vascular ED the underlying disease is progressing. The NIDDK's position is that ED is treatable at any age, and the practical corollary is that it is more easily treated early. Source: NIDDK, erectile dysfunction, checked October 27, 2026.

Neither is better; they fit different lives. Sildenafil is the as-needed drug with the longest track record and the lowest generic price, taken about an hour ahead and slowed by a heavy meal. Tadalafil lasts up to 36 hours as needed, is less affected by food, and is the only one with a daily option, which suits men who want spontaneity, who are active more than about twice a week, or who also have prostate urinary symptoms. The published trials found similar rates of improved erections for the two. A clinician usually chooses on timing preference, side-effect history and cost, and switching between them after a fair trial is routine. Our sildenafil vs tadalafil guide goes through the comparison in full. Sources: systematic review of PDE5 inhibitor trials, BMJ, 2005, checked October 27, 2026; MedlinePlus monographs for sildenafil and tadalafil.

This guide was written by the Treatments Hub research team in October 2026 from the primary sources linked inline, each checked on the date stated next to it. The clinical framework is the American Urological Association's erectile dysfunction guideline and the fourth Princeton Consensus on ED and cardiovascular disease; the drug facts are from the MedlinePlus monographs, which summarise each product's FDA prescribing information, and from the Viagra prescribing information itself; the definitions, causes and treatment categories follow the National Institute of Diabetes and Digestive and Kidney Diseases; the regulatory statements on compounded and tainted products are the FDA's own. Where a figure comes from a study rather than an agency, the study is named and the figure is reported as that study reported it. Nothing here is a statistic we generated, and no price appears, because prices belong in the dated cost index.

• American Urological Association, Erectile Dysfunction: AUA Guideline (2018) and the Journal of Urology publication.
• Princeton IV Consensus Recommendations, Mayo Clinic Proceedings (2024); Princeton IV: PDE5 inhibitors and cardiac health, Journal of Sexual Medicine (2024); American College of Cardiology summary (2024).
• NIDDK: erectile dysfunction, symptoms and causes, treatment, diabetes and sexual problems, and the archived NIDDK patient publication for the older prevalence figures.
• Feldman et al., Massachusetts Male Aging Study, Journal of Urology (1994).
• MedlinePlus drug monographs: sildenafil, tadalafil, vardenafil, avanafil, alprostadil urogenital.
• Viagra prescribing information, Pfizer.
• FDA: human drug compounding, consumer information; FDA: hidden risks of ED treatments sold online; FDA: tainted sexual enhancement products; FDA: BeSafeRx; NABP: buy safely.
• Fink et al., sildenafil meta-analysis, Archives of Internal Medicine (2002); indirect comparison of PDE5 inhibitors, BMJ (2005); guideline review of low-intensity shockwave therapy (2019).
• Johns Hopkins Medicine: erectile dysfunction after prostate cancer; erectile dysfunction post-radical prostatectomy, review (2017); Mayo Clinic: erectile dysfunction care.

This article is general information, not medical advice. Erectile dysfunction has causes that range from the trivial to the serious, and its treatments carry interactions that can be dangerous. Do not start, stop or change any medication on the basis of this guide; the decision belongs to a licensed clinician who knows your full health history. If you have chest pain on exertion, an erection lasting more than four hours, or a sudden change in vision or hearing, seek medical care immediately.