Tesamorelin reconstitution calculator

Medically reviewed by Juan Pablo Frías, MD · 3 Oct 2026 · DisclosureUpdated 3 Oct 2026Educational use only

1Vial size

2Bacteriostatic water added

3Dose per injection

4Syringe (U-100)

Draw to

20units

= 0.2 mL on a 1 mL U-100 insulin syringe

10 mg vial2 mL water1 mg dose

Concentration: 5 mg/mL
Doses per vial: 10
Weeks (1 dose/wk): 10

Math only. It does not recommend a dose. Tesamorelin: FDA approved (Egrifta).

Dosing table for a 10 mg vial

Syringe units (U-100) for each dose, by how much bacteriostatic water you add.

Tesamorelin: U-100 syringe units per dose for a 10 mg vial
Dose	1 mL water	2 mL water	2.5 mL water	3 mL water
0.5 mg	5	10	12.5	15
1 mg	10	20	25	30
1.5 mg	15	30	37.5	45
2 mg	20	40	50	60
2.5 mg	25	50	62.5	75
3 mg	30	60	75	90

How the math works

Concentration is the vial's milligrams divided by the water you add. Volume to draw is your dose divided by that concentration. On a U-100 syringe, 1 mL is 100 units, so units = mL × 100.

10 mg ÷ 2 mL = 5 mg/mL
1 mg ÷ 5 mg/mL = 0.2 mL
0.2 mL × 100 = 20 units

How many units is 1 mg of Tesamorelin?

With a 10 mg vial and 2 mL of bacteriostatic water, 1 mg is 20 units (0.20 mL) on a U-100 syringe. With 1 mL of water it is 10 units. The answer always depends on how much water was added.

How much bacteriostatic water for a 10 mg Tesamorelin vial?

The water only sets the concentration; the amount of Tesamorelin in the vial stays the same. 2 mL makes 5 mg/mL, so 1 mg is 20 units. 2.5 mL makes 4 mg/mL, so the same 1 mg is 25 units. More water makes small doses easier to measure but needs more volume per injection.

How many 1 mg doses are in a 10 mg vial?

10 ÷ 1 = 10, so 10 full doses of 1 mg. Any liquid lost in the needle and vial is not counted.

Preset doses are round numbers for the arithmetic, not dosing guidance. Vial sizes are the ones most often mentioned for Tesamorelin in community discussions.

20 units · 0.2 mL · 1 mg from 10 mg + 2 mL

Sources

1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026

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