Learn how to reconstitute tesamorelin with bacteriostatic water, correct diluent volume, and storage steps. Includes a 10 mg mixing chart and dosage basics.
To reconstitute tesamorelin, inject bacteriostatic water slowly into the vial, aiming the stream at the inner glass wall instead of the powder. Then swirl the vial gently until the powder dissolves completely, which usually takes one to two minutes. A 10 mg vial is commonly mixed with 1 mL to 2 mL of bacteriostatic water, producing a concentration of 10 mg/mL or 5 mg/mL, and you should never shake the vial.
What You Need Before You Start
Gather these supplies before you open the tesamorelin vial:
- Tesamorelin vial (lyophilized powder)
- Bacteriostatic water (0.9% benzyl alcohol)
- Alcohol swabs
- Insulin syringes (U-100, 0.5 mL or 1 mL)
- A larger mixing syringe (3 mL) if you prefer
- Clean, flat work surface
- Sharps container
Wash your hands thoroughly and let them dry. If you are working with a smaller vial, the same process applies as in how to reconstitute tesamorelin 2mg. Tesamorelin peptide reconstitution follows the same basic rules as other lyophilized peptides, so a little practice makes the steps quick.
Step-by-Step Instructions for Reconstituting Tesamorelin
- Sanitize the stoppers. Wipe the top of the tesamorelin vial and the bacteriostatic water vial with a fresh alcohol swab. Let them air dry for a few seconds.
- Draw the water. Pull back the plunger on a mixing syringe to draw the desired volume of bacteriostatic water. For a 10 mg vial, 1 mL or 2 mL is typical.
- Inject slowly. Insert the needle through the tesamorelin stopper at an angle. Aim the stream at the glass wall, not directly at the powder. Push the plunger slowly.
- Remove the needle. Withdraw the needle and safely dispose of it in the sharps container.
- Swirl gently. Roll the vial between your palms or swirl it in a slow circle. Do not shake. The powder should dissolve within 1–2 minutes.
- Inspect the solution. Hold the vial up to the light. The liquid should be clear and colorless. If it is cloudy or has particles, let it sit for a few more minutes. If it stays cloudy, do not use it.
- Label and store. Write the date and concentration on the vial. Store it in the refrigerator.
These are the core tesamorelin mixing instructions whether you are reconstituting tesamorelin 10mg or a larger 20 mg vial. The steps below show how to mix tesamorelin for any common vial size.
How Much Bacteriostatic Water to Mix with Tesamorelin
The most common question is how much bacteriostatic water to mix with 10mg of tesamorelin. The answer depends on the concentration you want. A higher concentration means a smaller injection volume; a lower concentration means a larger injection volume. The table below covers typical vial sizes and water volumes.
| Tesamorelin vial | Bacteriostatic water added | Concentration | Units for a 1 mg dose (U-100) | Units for a 2 mg dose (U-100) |
|---|---|---|---|---|
| 5 mg | 1 mL | 5 mg/mL | 20 units | 40 units |
| 5 mg | 2 mL | 2.5 mg/mL | 40 units | 80 units |
| 10 mg | 1 mL | 10 mg/mL | 10 units | 20 units |
| 10 mg | 2 mL | 5 mg/mL | 20 units | 40 units |
| 20 mg | 2 mL | 10 mg/mL | 10 units | 20 units |
This tesamorelin 10mg mixing chart and the 5 mg rows cover the most common setups. If you want a different concentration, use the formula in the next section. Many researchers also ask how much bac water to reconstitute peptides when they switch between vial sizes, and the math is identical.
Tesamorelin Reconstitution Calculator and Dosage Basics
A tesamorelin reconstitution calculator is just a shortcut for two simple formulas. You can do the math yourself in seconds:
- Concentration (mg/mL) = total peptide (mg) ÷ volume of water (mL)
- Dose volume (mL) = desired dose (mg) ÷ concentration (mg/mL)
- Units on a U-100 syringe = dose volume (mL) × 100
For example, a 10 mg vial mixed with 2 mL of bacteriostatic water gives 5 mg/mL. A 2 mg dose requires 0.4 mL, or 40 units on a U-100 syringe. The math for a larger vial is similar to how much bac water to reconstitute 20mg tirzepatide, even though the peptide is different.
Tesamorelin is FDA-approved as Egrifta for HIV-associated lipodystrophy, and the typical prescription dose is 2 mg once daily. However, dose decisions belong to a healthcare provider. Do not use this article to self-prescribe or change a prescription. For research use, follow your institution's guidelines.
Troubleshooting: Cloudy, Gelled, or Undissolved Tesamorelin
If your tesamorelin turned to gel, the peptide may have been damaged. Gelling usually happens when the vial is shaken, when the water is too cold, or when the concentration is too high. A cloudy solution is another warning sign. People often ask, 'why did my tesamorelin gel up?' The most common causes are:
- Shaking or vigorous mixing instead of swirling
- Using sterile water instead of bacteriostatic water
- Injecting the water directly onto the powder with too much force
- Letting the vial warm up too quickly after cold storage
- Using a vial that was already degraded
If the solution stays cloudy or gelled after gentle swirling for 5–10 minutes, do not inject it. A clear, colorless liquid is the goal. For a different peptide, the process is similar to how to reconstitute bpc 157 10mg. Some peptides require a different solvent, such as how to reconstitute aod 9604 with acetic acid, but tesamorelin uses bacteriostatic water.
Storage and Safety After Reconstitution
After reconstitution, store tesamorelin in the refrigerator at 2–8°C (36–46°F). Protect it from light by keeping it in its box or wrapping it in foil. Do not freeze the reconstituted solution. Most manufacturers recommend using it within 14–28 days, but check the specific product insert.
Tesamorelin is a prescription medication in the United States. It is not approved for general weight loss or athletic performance. Research-grade tesamorelin is not for human use. If you have a prescription, follow your healthcare provider's instructions exactly. If you are a researcher, follow your institutional safety protocols.
Always consult a healthcare professional before starting, stopping, or changing any peptide therapy. This article is for informational purposes only and is not medical advice.
Frequently Asked Questions
How much bacteriostatic water should I mix with 10 mg of tesamorelin?
Most people add 1 mL to 2 mL of bacteriostatic water to a 10 mg vial. That gives 10 mg/mL or 5 mg/mL, respectively. A 1 mg dose would be 10 units or 20 units on a U-100 syringe. Follow your prescription or research protocol for the exact dose.
Why did my tesamorelin turn into a gel?
Tesamorelin can gel if you shake the vial, use cold water, or mix it at a very high concentration. It can also gel if the peptide was degraded. If the solution remains gelled after gentle swirling, do not use it. Start with a new vial and swirl instead of shaking.
How long does reconstituted tesamorelin last in the refrigerator?
Most manufacturers recommend using reconstituted tesamorelin within 14 to 28 days when stored at 2–8°C (36–46°F). Protect it from light and never freeze it. Check the product insert for the exact beyond-use date. Discard it if the solution becomes cloudy.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.