Mounjaro 2.5 mg Tirzepatide Pen vs Mounjaro (tirzepatide) injection

Both are tirzepatide, so the drug is the same; the difference is the pen and the dose. The 2.5 mg pen is the starter dose, four single-use 0.5 mL pens per box, each delivering one 2.5 mg weekly shot. The 10 mg pen is a multi-dose pen holding 2.4 mL and four doses, for people already titrated up. Buy the 2.5 mg if you are starting or your clinician has you on the lowest dose; buy the 10 mg pen if you are on a higher maintenance dose and want one pen per month. Owners of both report the same tirzepatide effects: less appetite and better blood sugar, with nausea most common early on.

• Choose the Mounjaro 2.5 mg pen if you are starting tirzepatide or your clinician has prescribed the lowest dose, and you want single-use prefilled pens.
• Choose the Mounjaro 10 mg pen if you are already titrated to a higher weekly dose and want one multi-dose pen covering four weeks.