A 2.5 mg Mounjaro pen contains 4 doses.
Each multi-dose vial or single-patient-use KwikPen of Mounjaro contains 2.4 mL of solution, which provides 4 doses of 2.5 mg tirzepatide per 0.6 mL injection 1. This applies to all strength formulations of the multi-dose presentations—whether 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg—each pen delivers exactly 4 weekly doses at the specified strength.
Key Practical Points
- The 2.5 mg pen is specifically designed to deliver four 0.6 mL injections, each containing 2.5 mg of tirzepatide
- This is the standard starting dose for tirzepatide therapy, administered once weekly for the first 4 weeks 2
- After completing the initial 2.5 mg pen (4 weeks of treatment), patients typically escalate to 5 mg weekly 2, 1
Important Caveat
Never share a Mounjaro KwikPen between patients, even if the pen needle is changed 1. Each multi-dose pen is designated for single-patient use only to prevent cross-contamination and disease transmission 1.
The single-dose pen formulation contains only 0.5 mL (one dose), but the question specifically asks about the standard pen presentation, which is the multi-dose format containing 4 doses 1.