The quick answerZepbound (tirzepatide) produced up to 22.5% average weight loss in trials versus ~15% for Wegovy (semaglutide); Ozempic is the same semaglutide under its diabetes label. Verified prices: brand Zepbound $1,249/month and Wegovy $1,579 at altRx, versus compounded semaglutide from $59 and tirzepatide from $99 through licensed telehealth.
What's the difference between Zepbound, Wegovy and Ozempic?
Three names, two drugs, three FDA labels. Zepbound is tirzepatide, FDA-approved for chronic weight management - it targets two hormone receptors (GIP and GLP-1). Wegovy is semaglutide at weight-management dosing (up to 2.4 mg). Ozempic is the same semaglutide approved for type 2 diabetes at up to 2 mg - widely used off-label for weight loss, but the weight-loss approval belongs to Wegovy. So the real comparison is tirzepatide vs semaglutide, with Ozempic as semaglutide's diabetes-label sibling - our molecule-level comparison goes deeper.
Which is stronger - Zepbound or Wegovy?
On trial averages, Zepbound. Tirzepatide produced up to 22.5% average body-weight loss in its trials at the highest dose, versus roughly 15% for semaglutide in Wegovy's pivotal trial - a meaningful gap, with the usual honest caveats: averages hide individual variation, the drugs weren't compared head-to-head in those trials, and tolerability differs person to person.
Plenty of people respond excellently to semaglutide; some tolerate one and not the other. "Stronger on average" is true; "stronger for you" is what titration under a clinician discovers.
What do they cost out of pocket?
The verified numbers, not estimates: brand Zepbound runs $1,249/month and brand Wegovy $1,579 at altRx (Ozempic $1,149; Zepbound KwikPens from $299 first month at ro, then $399-$449 plus membership). The compounded route changes the math entirely: compounded semaglutide from a verified $59/month (wellmedr) and compounded tirzepatide from $99 - the same active ingredients through licensed telehealth with US state-licensed pharmacies. Full ladder on our cheapest GLP-1 page, checked against every provider's own site.
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Every provider's published plans - cheapest first, conditions under each price.
How do the side effects compare?
Same family, same character: GI effects dominate all three - nausea, constipation, diarrhea, especially during dose increases - because that's how this medication class works. Trial discontinuation rates were broadly similar, and the practical differences are individual: some people tolerate tirzepatide's dual mechanism better, some semaglutide.
Management is identical across them - slow titration, eating patterns, hydration - covered in our side-effects guide. Serious-but-rare warnings (pancreatitis, thyroid C-cell warnings) apply across the class.
What To Know Before Starting GLP-1 Treatment
Before starting GLP-1 treatment, it's important to understand a few key things. These medications require a prescription from a licensed clinician and aren't suitable for everyone. Some people may experience side effects, especially during the first few weeks as the body adjusts.
GLP-1s also tend to work best when combined with basic lifestyle habits like balanced nutrition and regular physical activity.
That's why choosing a provider that offers proper medical screening and ongoing follow-up support is essential for both safety and long-term success.
Can you switch from Ozempic to Zepbound?
Yes, people do - and here's the part the search results get dangerously wrong: there is no mg-to-mg dose conversion between semaglutide and tirzepatide. They're different molecules with different dose ladders; a prescriber typically starts the new medication at or near its own starting dose and titrates from there, judging by response and tolerability.
Never attempt a DIY conversion. If the switch you actually want is away from brand pricing rather than between molecules, that's a different move - our switching-to-compounded guide covers it.
Which one should you choose?
Decision logic, honestly ordered. Chasing maximum average efficacy with budget for brand: Zepbound leads the trial numbers.
Insurance covering one of them: the covered one usually wins the math - check your formulary first. Self-pay: the compounded route's $59-$99/month changes the entire question, which is why it's our default starting point for cash payers - compare on the ranking.
Diabetes plus weight goals: that's an Ozempic/Mounjaro-label conversation with your clinician. Whichever route: prescription required, titration takes months, and the provider's follow-up quality matters more than the logo on the pen.