Zepbound Volume Per Dose
Zepbound (tirzepatide) is administered as a 0.5 mL subcutaneous injection regardless of the dose strength (2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg).
Dosing Information
All Zepbound doses are delivered in a fixed 0.5 mL volume using pre-filled, single-dose pens. The concentration of tirzepatide varies by pen to deliver different mg doses, but the injection volume remains constant at 0.5 mL per administration 1, 2.
Available Dose Strengths (all in 0.5 mL):
- 2.5 mg per 0.5 mL
- 5 mg per 0.5 mL
- 7.5 mg per 0.5 mL
- 10 mg per 0.5 mL
- 12.5 mg per 0.5 mL
- 15 mg per 0.5 mL
Clinical Context
Tirzepatide is administered once weekly via subcutaneous injection. In clinical practice, most patients initiate therapy at ≤5 mg doses, with the majority remaining at <10 mg doses during the first 6 months of treatment 1. Dose escalation typically occurs around 59 days after initiation when clinically indicated 1.
The standardized 0.5 mL volume across all dose strengths simplifies administration and reduces dosing errors, as patients do not need to measure or adjust injection volumes—they simply use the appropriately labeled pre-filled pen for their prescribed dose.
Important Administration Notes:
- Each pen is single-use and pre-filled
- Administered subcutaneously (typically abdomen, thigh, or upper arm)
- No dilution or reconstitution required
- The pen automatically delivers the full 0.5 mL dose