How to Use / Administration Methods
Tirzepatide is administered exclusively via subcutaneous injection. Commercial formulations (Mounjaro and Zepbound) are available as single-dose autoinjector pens.
Injection Site Selection: The abdomen, thigh, or upper arm are all appropriate injection sites. Rotate sites with each injection to minimize local reactions. Avoid injecting into areas with active skin irritation, scarring, or lipodystrophy.
Injection Technique:
- Allow the pen or vial to reach room temperature before injecting (remove from refrigerator 30 minutes prior)
- Clean the injection site with an alcohol swab
- Pinch the skin and insert the needle at a 90-degree angle (45 degrees for lean individuals)
- Inject the medication slowly and hold the needle in place for 5–10 seconds
- Do not rub the injection site after withdrawal
- Administer on the same day each week; if switching days, ensure a minimum 72-hour gap between doses
- Tirzepatide can be taken with or without food
Research-Grade Powder: Research-use tirzepatide is available as lyophilized powder requiring reconstitution with bacteriostatic water before injection, following similar protocols to other research peptides.
Storage & Preparation
Commercial Formulations (Mounjaro/Zepbound):
- Store refrigerated at 2–8°C (36–46°F)
- Can be kept at room temperature (up to 30°C / 86°F) for a maximum of 21 days
- Protect from light and do not freeze
- Do not use if solution is cloudy, discolored, or contains particles
Research-Grade Lyophilized Powder:
- Reconstitute with bacteriostatic water (0.9% benzyl alcohol)
- Add diluent slowly along the vial wall, avoiding direct contact with the powder
- Gently swirl until dissolved, never shake vigorously
- Reconstituted solution should be clear and colorless
- Store reconstituted solution refrigerated at 2–8°C and use within 28 days
- Protect from light; avoid freeze-thaw cycles