How the Tesamorelin calculator works
The licensed product is a lyophilized powder in single-dose vials with its own sterile-water diluent. Other vials are lyophilized powder labelled in milligrams. The quick-fill buttons in the calculator are the vial sizes Tesamorelin is commonly labelled in (2 mg, 5 mg and 10 mg). If yours is different, type it in.
Amounts of Tesamorelin are usually written in milligrams (mg), so the calculator opens in mg.
If your vial is the licensed product, use the diluent and the volume given in its own instructions rather than any figure from this page.
For a field-by-field walkthrough and a guide to syringe types, see the main peptide calculator.
Tesamorelin concentration table
Each labelled vial size at the same three round water volumes used across this site. It shows how the arithmetic behaves and is not a suggestion of what to use.
| Vial | Water added | Concentration | Each mark holds |
|---|---|---|---|
| 2 mg vial | 1 mL | 2 mg/mL | 0.2 mg per 10 units |
| 2 mg vial | 2 mL | 1 mg/mL | 0.1 mg per 10 units |
| 2 mg vial | 3 mL | 0.67 mg/mL | 0.067 mg per 10 units |
| 5 mg vial | 1 mL | 5 mg/mL | 0.5 mg per 10 units |
| 5 mg vial | 2 mL | 2.5 mg/mL | 0.25 mg per 10 units |
| 5 mg vial | 3 mL | 1.67 mg/mL | 0.167 mg per 10 units |
| 10 mg vial | 1 mL | 10 mg/mL | 1 mg per 10 units |
| 10 mg vial | 2 mL | 5 mg/mL | 0.5 mg per 10 units |
| 10 mg vial | 3 mL | 3.33 mg/mL | 0.333 mg per 10 units |
Every row for a given vial holds the same total. To compare volumes for a specific reading, use the BAC water calculator.
The formula, step by step
The “Try example numbers” button uses one fixed rule on every page: the smallest labelled vial, 2 mL of water, and whatever amount lands on the 10-unit mark. The amount is a by-product of that rule and not a typical or suggested Tesamorelin dose.
- Concentration: 2 mg ÷ 2 mL = 1 mg/mL.
- The 10-unit mark is 10 ÷ 100 = 0.1 mL, which holds 0.1 × 1 = 0.1 mg.
- Run it forwards to check: 0.1 mg ÷ 1 mg/mL = 0.1 mL, and 0.1 × 100 = 10 units.
Tesamorelin: general reference
General educational reference for research purposes only. None of it is a recommendation, none of it is medical advice, and none of it is used by the calculator, which works only on the numbers you enter.
Tesamorelin is a synthetic analog of all 44 amino acids of human GHRH, with a small chemical group added at one end to make it more stable. It was developed by the Canadian company Theratechnologies.
The FDA approved it in November 2010 under the brand name Egrifta, as a prescription medicine for adults with HIV-associated lipodystrophy.
Unlike most approved medicines on this site, the licensed product is itself a freeze-dried powder that has to be reconstituted. It comes with its own diluent, which is sterile water rather than bacteriostatic water, and its own instructions.
There have been three licensed presentations with different vial strengths: the original Egrifta, Egrifta SV (2 mg vials) and Egrifta WR. Their labels state that they are not interchangeable.
- Class
- GHRH analog, approved medicine
- Group
- Growth hormone and IGF-1 axis
- Also known as
- Egrifta, TH9507
- Molecular weight
- About 5,136 Da
- Half-life
- Minutes, and it depends on the formulation. The original 2010 label gave a mean elimination half-life of 26 minutes in healthy subjects and 38 minutes in patients with HIV. The Egrifta SV label gives 8 minutes in healthy subjects, and the Egrifta WR label gives 11 minutes.
- Regulatory status
- Approved medicine (United States). Tesamorelin is FDA-approved as Egrifta, a prescription medicine. If you have the licensed product, follow its own instructions, which specify the diluent and the volume. This page is for the arithmetic of other vials.
- Status in sport
- Prohibited at all times under the WADA Prohibited List (section S2), where tesamorelin is named among the GHRH analogues.
- Labelled vial sizes
- 2 mg, 5 mg and 10 mg
Arithmetic slips to watch for with Tesamorelin
Licensed vials come with their own numbers
The approved product states how much diluent to add and how much to draw. Those instructions were written for that exact vial strength, so use them as given. The calculator is for checking arithmetic, not for replacing a label.
The presentations are not interchangeable
The original Egrifta, Egrifta SV and Egrifta WR have different vial strengths, so a volume worked out for one is wrong for another. Always start from the milligrams printed on the vial in front of you.
Milligram amounts, small volumes
With 2 mL of liquid, a 2 mg vial is 1 mg/mL, so 10 units on a U-100 syringe holds 0.1 mg. A 10 mg vial with the same 2 mL is 5 mg/mL, so 10 units holds 0.5 mg.
What this page does not do
The calculator performs mathematical conversions only. It does not recommend, suggest or verify any Tesamorelin dose or schedule, it does not say how much water to add, and it does not say what Tesamorelin is for, whether it is safe, or whether it is legal where you live. It is not medical advice, diagnosis or treatment, and Peptrack does not sell, supply or endorse any substance.
Always confirm measurements with a licensed healthcare provider or pharmacist. See the full disclaimer.
Egrifta, Egrifta SV and Egrifta WR are trademarks of Theratechnologies. Peptrack is not affiliated with, or endorsed by, any manufacturer.
Sources
- Egrifta SV (tesamorelin) prescribing information, DailyMed
- Egrifta (tesamorelin) original 2010 prescribing information, FDA
- WADA Prohibited List
Facts last checked: September 2026. Regulatory status changes, so check the regulator’s own pages for the current position.
