Mounjaro vs Zepbound vs Ozempic vs Wegovy: What's the Difference?

Four brand names, constant confusion. Are they the same? Different? Which one is for weight loss? Here is the decoder, because the names hide a pretty simple pattern.

The short version

There are really just two drugs behind these four names:

• Tirzepatide is sold as Mounjaro and Zepbound
• Semaglutide is sold as Ozempic and Wegovy

The brand split is mostly about what each version is officially approved to treat.

Tirzepatide: Mounjaro vs Zepbound

Same drug (tirzepatide), two brands:

• Mounjaro is the version branded for type 2 diabetes
• Zepbound is the version branded for weight loss / obesity

Same active compound, different official label. If weight loss is the goal, Zepbound is the weight-loss-branded one - but the drug inside is tirzepatide either way.

Semaglutide: Ozempic vs Wegovy

Same drug (semaglutide), two brands:

• Ozempic is branded for type 2 diabetes
• Wegovy is branded for weight loss / obesity

(There is also Rybelsus, an oral semaglutide pill.) Again, same compound, different approved use. Ozempic just became the famous name because it came first and went viral.

So which is "best" for weight loss?

It comes down to the underlying drug, not the brand. Tirzepatide (Zepbound/Mounjaro) tends to produce more weight loss than semaglutide (Wegovy/Ozempic) in the research. We break that head-to-head down in Tirzepatide vs Semaglutide.

So "Zepbound vs Wegovy" is really just "tirzepatide vs semaglutide" wearing brand names.

Quick FAQ

Are Mounjaro and Zepbound the same? Same drug (tirzepatide). Mounjaro is branded for diabetes, Zepbound for weight loss.

Are Ozempic and Wegovy the same? Same drug (semaglutide). Ozempic is branded for diabetes, Wegovy for weight loss.

Is tirzepatide the same as Ozempic? No. Tirzepatide is Mounjaro/Zepbound. Ozempic is semaglutide - a different drug.

Which is best for weight loss? The tirzepatide brands (Zepbound/Mounjaro) tend to edge out the semaglutide ones on average. See our full comparison.

This is educational info for research purposes, not medical advice. These are prescription medications - talk to a healthcare professional about which is right for you.