How to Store Tesamorelin: Powder, Reconstituted Vials, and Shelf Life

Tesamorelin should be stored cold, dark, and undisturbed. Keep unreconstituted powder in the refrigerator at 2–8 °C (36–46 °F) or in a freezer at −20 °C, and keep reconstituted vials refrigerated at 2–8 °C, protected from light, and use them within about 14 days. Heat, light, shaking, and repeated temperature swings damage the peptide faster than time alone.

Tesamorelin Storage at a Glance

Tesamorelin is a synthetic growth hormone-releasing hormone (GHRH) analog. The FDA-approved version is sold as Egrifta and Egrifta SV for HIV-associated lipodystrophy, while lyophilized research-grade tesamorelin sold online is not FDA-approved for human use. The chemistry of peptide degradation is the same either way.

How to Store Tesamorelin Powder

Dry, lyophilized tesamorelin is the most stable form, because the peptide sits in a solid cake with very little water available for hydrolysis.

• Refrigerator: 2–8 °C for vials you will use within a few months.
• Freezer: −20 °C for long-term storage. Leave the vial sealed and let it warm to room temperature before opening to avoid condensation.
• Dark: keep the vial inside its carton. UV light oxidizes sensitive residues and slowly reduces potency.
• Dry: a sealed container with a desiccant packet helps in humid climates.

The rules for how to store hgh transfer almost directly here: cold, dark, dry, and undisturbed. Skip the refrigerator door, where temperatures climb every time the door opens.

How to Store Tesamorelin After Reconstitution

Once water meets the powder, the clock starts. Reconstituted tesamorelin is far more fragile than the powder it came from.

1. Refrigerate right away at 2–8 °C. Do not leave a mixed vial on the counter while you finish other tasks.
2. Swirl, do not shake. Aim the stream at the glass wall, not the cake, and roll the vial gently between your fingers.
3. Label the vial with the reconstitution date and the diluent you used.
4. Protect it from light by storing it in a box, a sleeve, or a drawer.
5. Never freeze it. Freezing and thawing reconstituted peptide encourages aggregation and gelling.
6. Plan to finish it within 14 days. FDA labeling for Egrifta states that the reconstituted solution should be refrigerated and used within 14 days; many research users report usable results up to roughly 28 days, with potency likely declining gradually after two weeks.

If you mix with bacteriostatic water, remember that the preserved diluent itself has a practical shelf life of about 28 days after the first puncture, so review how to store bac water after opening before you start. For a mixing walkthrough, see how to reconstitute tesamorelin 2mg.

How Long Does a 10 mg Vial of Tesamorelin Last?

A 10 mg vial lasts as long as your daily dose allows, but the mixed solution should still be finished inside the 14-day refrigerated window.

Unreconstituted powder generally lasts until the printed expiration date, often one to two years from manufacturing, as long as it stays cold and dry. The doses above are illustrative; approved tesamorelin dosing is set by a prescriber, not by a vial size.

Why Tesamorelin Gelled Up and What To Do

Gelling is the clearest sign that handling went wrong. Common causes include:

• Shaking the vial instead of swirling it.
• Freezing a reconstituted vial and thawing it out.
• Mixing at a very high concentration, where peptide molecules clump together.
• Using a diluent with the wrong pH or ionic strength.
• Temperature extremes, such as a hot car or a frost-covered freezer wall.

Try letting the vial sit at room temperature for a few minutes and swirl gently. If the solution turns clear, it is probably fine to use. If it stays cloudy, stringy, or gelatinous, discard it, because a gelled peptide will not deliver a uniform dose.

Room Temperature, Travel, and Common Mistakes

How long can tesamorelin be out of the fridge? Powder handles a day at room temperature during shipping without much loss. Reconstituted solution should be back in refrigeration within an hour or two.

• Never store vials in a car, a glovebox, or checked luggage.
• Use an insulated travel case and wrap the gel pack so the vial never touches it directly.
• Do not refreeze after thawing, and do not store near a freezer's defrost cycle.
• Swab the stopper with alcohol and let it dry before drawing a dose.

Storage keeps a peptide potent, but it does not change how quickly the drug acts. That timing question is covered separately in how long does tesamorelin take to work. If you handle other peptides, the same principles behind how to store bpc 157 apply, because cold, dark, and still is the universal rule.

Bottom line: refrigerate tesamorelin powder at 2–8 °C, refrigerate reconstituted solution at 2–8 °C, never freeze it after mixing, and finish a mixed vial within about 14 days.

Safety note: Tesamorelin is a prescription medication in the United States and is not approved for general weight loss or athletic use. Research-grade peptides sold online are not for human consumption. Talk with a licensed healthcare professional before starting, stopping, or storing any injectable peptide.