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Tirzepatide: 15 mg vial with 2 mL water
Quick answer
Adding 2 mL of bacteriostatic water to a 15 mg Tirzepatide vial gives 7.5 mg/mL (7500 mcg/mL), so each unit on a U-100 insulin syringe holds 75 mcg. A 100 mcg dose is 1.3 units (0.013 mL), and the vial holds about 150 doses of that size.
Concentration
- Vial: 15 mg Tirzepatide
- Bacteriostatic water: 2 mL (the volume in the Crestigen protocol)
- Concentration: 7.5 mg/mL (7500 mcg/mL)
- 1 unit on a U-100 syringe = 75 mcg
Tirzepatide dose to syringe units
| Dose | Syringe units (U-100) | Volume | Doses per vial |
|---|---|---|---|
| 2.5 mcg (protocol dose) | 0 units, too small to measure reliably | 0 mL | 6000 |
| 5 mcg (protocol dose) | 0.1 units, too small to measure reliably | 0.001 mL | 3000 |
| 7.5 mcg (protocol dose) | 0.1 units, too small to measure reliably | 0.001 mL | 2000 |
| 10 mcg (protocol dose) | 0.1 units, too small to measure reliably | 0.001 mL | 1500 |
| 100 mcg | 1.3 units | 0.013 mL | 150 |
| 200 mcg | 2.7 units | 0.027 mL | 75 |
| 250 mcg | 3.3 units | 0.033 mL | 60 |
| 300 mcg | 4 units | 0.04 mL | 50 |
Units on a U-100 insulin syringe (100 units = 1 mL).
Common questions
How many units is 100 mcg of Tirzepatide from a 15 mg vial with 2 mL water?
100 mcg is 1.3 units (0.013 mL) on a U-100 insulin syringe. With 2 mL of water in a 15 mg vial, each unit holds 75 mcg. For comparison: 200 mcg = 2.7 units, 250 mcg = 3.3 units, 300 mcg = 4 units.
What is the concentration of a 15 mg Tirzepatide vial mixed with 2 mL of water?
15 mg divided by 2 mL is 7.5 mg/mL, or 7500 mcg per mL. On a U-100 syringe (100 units = 1 mL) that is 75 mcg per unit.
How many 100 mcg doses are in a 15 mg vial?
About 150. The water volume changes how many units each dose takes, not how many doses the vial holds.
How much water should I add to a 15 mg Tirzepatide vial?
2 mL is the volume used in the Crestigen Tirzepatide protocol. More water makes each dose a larger, easier-to-measure number of units; less water keeps injections smaller.
Other Tirzepatide vial and water combinations
- 15 mg vial + 1 mL water
- 15 mg vial + 2 mL water
- 15 mg vial + 3 mL water
Open this in the dosage calculator · Full Tirzepatide protocol, reconstitution and storage