How to Use This Calculator
Pick your vial size (2, 5 or 10 mg, or type a custom amount), then enter how much bacteriostatic water you added, your daily dose in mg and your syringe size. Click Calculate to see how many units and mL to draw, the concentration in mg/mL, how many doses the vial holds and how many days it lasts at one dose a day. If the draw is too big for the syringe you chose, the calculator tells you.
What Is Tesamorelin?
Tesamorelin is a lab-made version of growth hormone releasing hormone (GHRH), the signal the brain uses to tell the pituitary gland to release growth hormone. It is 44 amino acids long, with a small chemical group added at one end that helps it last longer in the body than natural GHRH.
What the Approved Labels Use
The two approved products use different vials and doses, and the label says they cannot be swapped for each other. Egrifta SV is a 2 mg vial mixed with 0.5 mL of sterile water, and the daily dose is 1.4 mg, which is 0.35 mL or 35 units on a U-100 syringe. Egrifta WR is an 11.6 mg vial mixed with 1.3 mL of bacteriostatic water. Its label gives a concentration of 8 mg/mL and a daily dose of 1.28 mg, which is 0.16 mL or 16 units. The clinical trials behind the original approval used 2 mg a day. These numbers are shown as context, not as a dose to follow. (Sources: Egrifta WR and Egrifta SV prescribing information.)
Choosing the Water Volume and Syringe
More water means a weaker solution, so each dose becomes a bigger draw that is easier to measure but may not fit a 0.3 mL or 0.5 mL syringe. The BAC Water Calculator helps you pick a water volume that gives a clean draw, and the Syringe Volume Calculator shows where that draw sits on each barrel size. To plan how many vials you need, use the Peptide Vial Yield Calculator and the Peptide Cycle Cost Estimator. For timing, see the Peptide Half-Life Calculator.
Who Should Use This
Researchers working with lyophilised tesamorelin who need to reconstitute a vial and turn a daily dose in mg into syringe units.
What This Calculator Does
The Tesamorelin Dosage Calculator turns a vial size, the bacteriostatic water added and a daily dose in mg into the draw on a U-100 insulin syringe. It shows the units and mL to draw, the concentration, how many doses the vial holds and how many days it lasts at one dose a day.
Formula Used
Concentration (mg/mL) = Vial size (mg) / BAC water (mL)Volume per dose (mL) = Daily dose (mg) / ConcentrationUnits to draw = Volume (mL) x 100 (U-100 syringe)Doses per vial = FLOOR(Vial size / Daily dose)Days per vial = Doses per vial (one dose a day)Example Calculation
Limitations
This is a unit-conversion tool, not dosing guidance. It assumes the whole vial dissolves, a U-100 syringe and one dose a day, and it ignores dead space and draw loss. The approved Egrifta products come with their own mixing steps, so follow the label for those, not this calculator.
Frequently Asked Questions
Is tesamorelin FDA-approved?
Yes, but only as two branded products, Egrifta SV and Egrifta WR, and only for reducing excess belly fat in adults with HIV-associated lipodystrophy. The label says the two products are not interchangeable because their vials, mixing and doses differ.
How many units is 1 mg of tesamorelin?
It depends on how much water is in the vial. With 2 mg in 1 mL, 1 mg is 50 units. With 5 mg in 2 mL, it is 40 units. With 10 mg in 2 mL, it is 20 units. All three are on a U-100 syringe.
How many days does a tesamorelin vial last?
Divide the vial's milligrams by your daily dose and round down. A 10 mg vial at 1 mg a day lasts 10 days. A 5 mg vial at 1.4 mg a day gives 3 full doses, with a small amount left over.
Should I use bacteriostatic water or sterile water?
The Egrifta SV label uses sterile water because each vial is a single dose. Egrifta WR uses bacteriostatic water because one vial covers several doses and the preservative helps keep it clean between draws. Our guide on BAC water vs sterile water explains the difference.
Does the syringe size change the number of units?
No. On any U-100 syringe, units are always mL x 100, so 0.4 mL is 40 units on a 1 mL, 0.5 mL or 0.3 mL barrel. A smaller syringe only changes how much it can hold, not the reading.