Mounjaro vs Wegovy: Which Is Better for Weight Loss?

The Short Answer

In clinical trials, Mounjaro/Zepbound led to slightly more weight loss on average than Wegovy. But "slightly more" doesn't mean it's better for you.

The best medication is the one you can get, afford, tolerate, and stick with long-term.

What They Are

Wegovy contains semaglutide. It's a GLP-1 receptor agonist — it mimics one hormone that tells your brain you're full and slows down your stomach.

Mounjaro/Zepbound contains tirzepatide. It mimics two hormones — GLP-1 and GIP. Think of it as GLP-1 plus a bonus mechanism.

Both are once-weekly injections. Both are made by major pharmaceutical companies (Novo Nordick for Wegovy, Eli Lilly for Mounjaro/Zepbound).

Weight Loss Results: Head to Head

These numbers come from the clinical trials for each drug:

Important context:

• These are averages. Some people lost more, some lost less.
• The trials weren't head-to-head, so direct comparison isn't perfect.
• Real-world results are often lower than trial results.
• Both drugs work best combined with diet and exercise changes.

Side Effects Comparison

Both medications have similar side effects because they work on similar systems:

The general pattern: side effects are worst when you start and after each dose increase. They usually improve within a few weeks at each dose level.

Some people report more side effects with Mounjaro because it hits two hormone receptors. Others find it gentler. It's very individual.

Dosing Schedule

Both follow a slow ramp-up. See our full dosage guide for details.

Cost and Insurance

Wegovy:

• List price: ~$1,350/month without insurance
• Often covered by insurance for weight loss (FDA-approved indication)
• Novo Nordick offers savings cards

Mounjaro/Zepbound:

• List price: ~$1,060/month without insurance
• Zepbound (weight loss version) is more likely to be covered than Mounjaro (diabetes version)
• Eli Lilly offers savings cards

The reality: Your insurance situation will probably decide this for you. Check your formulary before getting attached to one option.

Who Might Prefer Wegovy?

• Your insurance covers it and not Mounjaro
• You've tried semaglutide before (as Ozempic) and did well
• You want the longer track record (semaglutide has been on the market longer)
• Your doctor has more experience prescribing it

Who Might Prefer Mounjaro/Zepbound?

• Your insurance covers it and not Wegovy
• You tried semaglutide and didn't lose enough weight
• You want the option of a higher maximum effect
• Your doctor recommends it based on your specific health profile

Can You Switch?

Yes. Some people start on one and switch to the other. Common reasons:

• Insurance changes
• Side effects don't improve
• Weight loss plateaus
• Supply shortages

If you switch, you'll typically start at the lowest dose of the new medication and titrate up again.

What About Compounded Versions?

Both semaglutide and tirzepatide are available through compounding pharmacies at lower prices. This can be a good option if:

• Your insurance won't cover the brand name
• You can't afford the list price
• There's a supply shortage

But be careful. Only use reputable compounding pharmacies. Ask your doctor for recommendations.

Read more about compounded GLP-1 medications for what to look out for.

The Bottom Line

Both medications work well. Mounjaro shows slightly better numbers in trials, but Wegovy has been around longer and works great for millions of people.

Your decision should come down to:

1. What your insurance covers
2. What your doctor recommends
3. What you can afford
4. How your body responds

There's no wrong choice here. Both are effective tools for weight loss when combined with healthy habits.

If you're just starting your GLP-1 journey, our side effects timeline will help you know what to expect week by week.