Tesamorelin Reconstitution: 2mg + 2mL Chart

Tesamorelin ships as a lyophilized (freeze-dried) powder that is reconstituted with bacteriostatic water before use. Trial protocols and community sources describe a standard reconstitution process, with one simplifying feature documented at the most common dilution (2 mL into a 2 mg vial): the full vial equals the full daily dose, with no syringe math required.

Research-context information only. Tesamorelin is the active ingredient in an FDA-approved product for HIV-associated lipodystrophy; research-peptide and compounded forms are not FDA-approved and are sold for research purposes only. Protocols, doses, and reactions reported below come from published clinical trials and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.

This guide reports reconstitution for research-grade tesamorelin vials. The FDA-approved tesamorelin product comes with its own diluent and mixing instructions from the manufacturer.

For dosing protocols, see our Tesamorelin Dosing Guide.

New to bacteriostatic water? Start with what it is, how much to use per vial, and how long it lasts — or see the full Bacteriostatic Water Guide.

Materials Documented in Reconstitution Protocols

• Tesamorelin lyophilized vial (typically 2 mg, 5 mg, or 10 mg)
• Bacteriostatic water (BAC water) — not sterile water, not saline
• Insulin syringes — 1 mL (100 unit), 29-31 gauge
• A separate drawing syringe — for pulling BAC water (optional but cleaner)
• Alcohol swabs — for cleaning vial tops before each puncture
• A clean, flat workspace with good lighting

Why bacteriostatic water specifically? It contains 0.9% benzyl alcohol that inhibits bacterial growth in the solution, supporting up to 28 days of refrigerated use per vial. Sterile water has no preservative — vials reconstituted with it are typically discarded within 24 hours. For single-use 2 mg vials (one vial = one dose), sterile water is documented as adequate. For larger multi-dose vials, BAC water is the documented standard.

Documented Reconstitution Steps

Step 1: Surface Preparation

Standard reconstitution practice is to wipe the rubber stopper of both vials (tesamorelin and BAC water) with an alcohol swab and allow 10 seconds to air dry. This step is consistently cited as the contamination-prevention checkpoint.

Step 2: Drawing Bacteriostatic Water

A fresh insulin syringe is used to draw the BAC water from its vial. For a 2 mg vial, 2 mL is drawn (200 units on an insulin syringe, or using a 3 mL syringe).

The plunger is pulled back slowly and steadily, with air bubbles tapped out before proceeding.

Step 3: Adding Water to the Tesamorelin Vial

Trial protocols describe inserting the needle into the tesamorelin vial at a slight angle, aiming at the glass wall — not directly at the powder cake.

The water trickles down the side of the vial as the plunger is released slowly.

Spraying water directly onto the powder is discouraged in standard reconstitution practice. Tesamorelin is a 44-amino-acid peptide with a trans-3-hexenoic acid modification. Aggressive force at the injection point can shear peptide bonds and reduce potency. The side-wall technique is documented across lyophilized peptides.

Step 4: Dissolution

Standard reconstitution practice is to swirl the vial gently with a slow rotating motion between the fingers. Trial protocols specify gentle swirling rather than shaking. Properly manufactured tesamorelin is documented to dissolve within 1-2 minutes into a clear, colorless solution.

A cloudy solution, visible particles, or discoloration after 5 minutes of gentle swirling is widely flagged as a sign of degraded peptide.

Step 5: Drawing the Dose

For a 2 mg vial reconstituted with 2 mL, the full vial corresponds to one dose. All 100 units (1 mL) are drawn with an insulin syringe, plus any remaining solution. No math is required.

For larger vials, refer to the dilution charts and syringe math sections below.

Dilution Chart (2 mg Vial)

The 2 mg vial is the most common size and the simplest to work with.

Most-cited dilution: 2 mL into a 2 mg vial. At this concentration, the standard 2 mg daily dose corresponds to the entire vial — drawn whole, injected whole. Zero calculation, zero waste.

For 1 mg doses (cited in some off-label protocols), 1 mL of BAC water yields 100 units = 1 mg for clean single-syringe dosing.

Dilution Charts (Larger Vials)

5 mg Vial

Most-cited dilution: 2.5 mL for a clean 2 mg/mL concentration. A 2 mg dose = 100 units = one full insulin syringe.

10 mg Vial

Most-cited dilution: 5 mL for 2 mg/mL — yielding 5 doses per vial at 100 units each.

15 mg and 20 mg Vials

Larger vials are more cost-effective per milligram but require more precise measurement. For the 20 mg vial at 4 mg/mL, a 0.5 mL (50 unit) insulin syringe is commonly cited for improved dose accuracy at the 50-unit mark.

Syringe Math

The formula works for any vial size and any dilution:

Concentration (mg/mL) = Peptide amount (mg) / BAC water volume (mL)

Units to inject = Desired dose (mg) / Concentration (mg/mL) x 100

Worked examples:

• 2 mg vial + 2 mL water = 1 mg/mL. For 2 mg dose: 2 / 1 x 100 = 200 units (full vial)
• 5 mg vial + 2.5 mL water = 2 mg/mL. For 2 mg dose: 2 / 2 x 100 = 100 units
• 10 mg vial + 5 mL water = 2 mg/mL. For 2 mg dose: 2 / 2 x 100 = 100 units
• 20 mg vial + 5 mL water = 4 mg/mL. For 2 mg dose: 2 / 4 x 100 = 50 units

Doses per vial at 2 mg daily:

All multi-dose vials sit well within the 28-day reconstituted shelf life at the standard 2 mg daily dose. The tesamorelin cycle cost calculator reports how vial size affects total cycle cost.

Vendor comparison is documented on our best tesamorelin sources page, with active discount codes listed under vendor coupons.

Affiliate disclosure: vendor links in this article are affiliate links — The Peptide Catalog may earn a commission if you buy through them, at no additional cost to you.

Storage Rules

Documented storage practices:

• Reconstituted tesamorelin is not frozen in published stability data. Ice crystal formation shears peptide bonds and destroys the molecule. Only lyophilized powder is documented as freezer-stable.
• Time at room temperature is minimized. Standard practice is brief draw-and-return handling rather than extended counter time. Every minute at room temperature is documented to degrade the peptide incrementally.
• Direct light exposure is avoided. Storage in the original box or wrapped in foil is documented for refrigerators with interior lighting.
• Single-use vials (2 mg + 2 mL): The entire vial is one dose. No storage of reconstituted solution is needed — mixed, drawn, and injected.

Common Mistakes Documented in Community Sources

Spraying Water Directly Onto the Powder

The most frequently cited reconstitution error across peptides. The documented technique is aiming the syringe stream against the glass wall and letting water trickle down. Direct force can denature the 44-amino-acid tesamorelin chain and reduce potency.

Insufficient Bacteriostatic Water Volume

0.5 mL added to a 2 mg vial creates a 4 mg/mL concentration. A 1 mg dose at that concentration is only 25 units — a tiny volume that is harder to measure accurately on an insulin syringe. Low volumes amplify measurement error. Documented dilutions above produce clean, round numbers.

Shaking the Vial

Vigorous shaking creates foam and air-liquid interfaces that can denature peptide bonds. Trial protocols specify gentle swirling rather than shaking. Slow dissolution is typically resolved by waiting 2-3 minutes upright — tesamorelin is documented to dissolve readily.

Room-Temperature Storage of Reconstituted Vials

Peptide degradation accelerates at room temperature. Vials left out during a morning routine and not returned to the fridge are documented as a common community-reported failure mode. Every hour at room temperature is documented to shorten shelf life and reduce potency. Standard practice keeps reconstituted tesamorelin refrigerated except during draw.

Reusing Needles

Each puncture through the rubber stopper dulls the needle tip and increases contamination risk. A fresh syringe per injection is the documented standard. When a separate drawing needle is used, a fresh injection needle is documented as the next step before administration.

Related Reading

• Tesamorelin Side Effects: HIV Trial Data Breakdown — adverse event profile from clinical trials and community reports
• Tesamorelin Dosing Guide — FDA protocol, off-label cycling, and injection sites
• Tesamorelin Benefits — 6 research-backed effects ranked by evidence quality
• Tesamorelin Results Timeline — week-by-week expectations from first injection to 6 months
• Tesamorelin Bloodwork Guide — 7 labs to track with optimal ranges and testing cadence
• Sermorelin Dosing Guide — alternative GHRH analog reconstitution and dosing
• BPC-157 Reconstitution Guide — similar mixing process for a different peptide class
• Tesamorelin Cost: Vial Prices by Vendor — compare prices across 9 vendors before buying
• Tesamorelin/Ipamorelin Buying Guide — GHRH+GHRP blend pricing + ratios

References

For educational and research purposes only. This is not medical advice. Tesamorelin is FDA-approved for HIV-associated lipodystrophy; off-label use should be discussed with a physician.