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Basics & Technique

How do I reconstitute a 10 mg tesamorelin vial?

Updated 2026-05-05

Add 2 mL of bacteriostatic water to a 10 mg tesamorelin vial. That gives you 5 mg per mL. On a U-100 insulin syringe, 10 units equals 500 mcg. A 1 mg dose is 20 units, a 1.4 mg dose is 28 units, and a 2 mg dose is 40 units. Pour the water down the wall, swirl 30 seconds, and refrigerate. The prescription brand uses different vial sizes - this math is for research-grade 10 mg vials.

IfIf your dose is 1 mg
Thenthen draw 20 units on a U-100 insulin syringe
IfIf your dose is 1.4 mg (the approved daily dose)
Thenthen draw 28 units on a U-100 insulin syringe
IfIf you have a 5 mg research vial instead
Thenthen add 1 mL of bac water for the same 5 mg/mL math
IfIf you have the prescription Egrifta SV vial
Thenthen follow the package insert - it uses sterile water and 0.5 mL, not bacteriostatic water
Key facts
  • 10 mg vial + 2.0 mL bac water = 5 mg/mL concentration
  • On a U-100 syringe at 5 mg/mL, 1 unit = 50 mcg
  • The Egrifta SV brand prescription vial (2 mg) uses 0.5 mL of sterile water and is dosed at 1.4 mg daily
  • Inject in the abdomen and rotate sites; tesamorelin is the only growth-hormone-releasing peptide approved in the US for body composition
  • Mixed research vial keeps in the fridge ~28 days; the brand vial must be used right after mixing
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