The math for this vial
- Concentration: 10 mg ÷ 2 mL = 5 mg/mL (5,000 mcg/mL).
- Volume of one U-100 unit: 1 ÷ 100 = 0.01 mL.
- Mass in one unit: 5,000 mcg/mL × 0.01 mL = 50 mcg.
- The whole vial is 200 U-100 units of solution, more than one 1 mL syringe holds.
On a U-40 syringe each unit is 0.025 mL, so each unit holds 2.5 times as much: 125 mcg at 2 mL. See U-100 vs U-40 units.
Unit chart
What common U-100 readings hold from a 10 mg vial, by water volume.
| Units | mL | 1 mL water | 2 mL water |
|---|---|---|---|
| 1 | 0.01 | 100 mcg | 50 mcg |
| 5 | 0.05 | 500 mcg | 250 mcg |
| 10 | 0.1 | 1 mg | 500 mcg |
| 20 | 0.2 | 2 mg | 1 mg |
| 25 | 0.25 | 2.5 mg | 1.25 mg |
| 50 | 0.5 | 5 mg | 2.5 mg |
| 100 | 1 | 10 mg | 5 mg |
About this vial size
10 mg is the largest common Tesamorelin vial. Across the water volumes above, one U-100 unit holds between 50 mcg (at 2 mL) and 100 mcg (at 1 mL). Compared with a 5 mg vial at the same water volume, it is 2 times as concentrated, so the same mass takes 0.5 times the units.
The approved Egrifta SV is a 2 mg lyophilized vial reconstituted with sterile water supplied in the pack, per its prescribing information. That labeling applies to Theratechnologies' formulation only.
Storage and handling
- Egrifta SV's prescribing information calls for use immediately after reconstitution and discarding unused solution. Research material has no stability data of its own.
- General practice for anything kept after mixing: refrigerate (2-8 °C), avoid freezing, protect from light, label.
Tesamorelin is FDA-approved as Egrifta for one specific use. "Research" tesamorelin is not that product, and FDA's August 2026 warning letters named it.