Mounjaro vs Zepbound: what's the difference?

Like Ozempic and Wegovy, Mounjaro and Zepbound are the same medication under two names — both are tirzepatide. The differences are in labeling and presentation, not the molecule.

What’s the same

Both are once-weekly tirzepatide, the dual-action medication that’s drawn so much attention for weight loss. The dose levels, the once-weekly rhythm, and the way you track them are identical.

What’s different

• The label. Mounjaro is approved for type 2 diabetes; Zepbound is approved for weight management (and, more recently, for obstructive sleep apnea).
• Presentation. Depending on your market, you may see prefilled pens or single-dose vials — Zepbound’s vial option is common.
• Coverage. Which one you’re prescribed often comes down to diagnosis and what your plan covers.

Tracking either is the same

Tirzepatide climbs through several dose levels. Whether your prescription says Mounjaro or Zepbound, you’re tracking the same things: your weekly shot, which dose step you’re on, your weight trend, and how you feel.

And if you’re on a vial rather than a pen, that only changes how you draw the dose — not how you log it.

Keep it private either way

With Lirea, your tirzepatide history stays encrypted on your device — no account, no server — so the brand on the box never matters to your record.

Same medication, two labels. Track tirzepatide, not the name.

Mounjaro or Zepbound, it’s the same journey — and the same one-tap log.