Vial duration

Tesamorelin vial duration calculator

Estimate how many weeks one 5 mg Tesamorelin vial covers at your dose and weekly cadence.

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Last updated: May 13, 2026

Vial (mg)

Dose (mg)

Doses / week

Total doses

Lasts

0.7 weeks

Tesamorelin weeks-of-supply at common cadences

How long one 5 mg Tesamorelin vial covers at a 1 mg per dose, for three weekly cadences. Total doses per vial: 5.

Doses per week	Total doses per vial	Weeks of supply
6	5	0.8
7	5	0.7
8	5	0.6

Math weeks-of-supply assumes every dose draws cleanly. Stability typically caps a reconstituted vial at 4–6 weeks of refrigerated use regardless of how much liquid remains.

Worked example

How long one Tesamorelin vial lasts, the long version

Total doses in the vial: floor(5 ÷ 1) = 5. The floor matters — a partial dose at the bottom doesn't count.
Cadence: 7 doses per week for Tesamorelin at this example step.
Math weeks-of-supply: 5 ÷ 7 = 0.7 weeks of liquid in the vial.
Stability ceiling: most reconstituted peptides are typically used within 4–6 weeks of refrigerated storage. Whichever number is smaller is the one that binds your refill date.
Doubling the dose roughly halves both numbers — and titration usually closes the gap between "math weeks" and "stability weeks" without you noticing.

Scenarios people actually run into

Three things that come up logging Tesamorelin

Math says one 5 mg Tesamorelin vial covers 0.7 weeks at 1 mg per dose. Stability typically caps a reconstituted vial at 4–6 weeks. Whichever number is smaller is the date on your refill calendar.
Titration up doubles the dose and halves the vial. A 12-week-on-paper vial becomes a 6-week vial the day you step up — order the next vial the same day you take the step.
Shipping windows are the silent third constraint. If your supplier runs 1–3 weeks, the refill order has to leave at least that long before "math weeks" or "stability weeks," whichever is binding.

Same-category neighbor

Tesamorelin next to GHRP-2

Both sit in the GH Secretagogue bucket — here's the vial duration math side by side on each one's example vial.

	Tesamorelin	GHRP-2
Vial	5 mg	5 mg
Cadence	7/wk	7/wk
Weeks of supply	0.7	7.1

Want the full breakdown? GHRP-2 reference →

Tesamorelin is a daily injection people use specifically to reduce stubborn deep belly fat (visceral adipose tissue). It's an analog of growth hormone-releasing hormone (GHRH) that prompts the pituitary to release more of the body's own GH. In FDA trials for HIV-related lipodystrophy, daily 2 mg injections reduced visceral fat by about 15–18% over 26 weeks. This page covers reconstitution math and daily dose logging.

Planning Tesamorelin vials in real life

Tesamorelin is the GH-secretagogue with the heaviest mg-load, and that translates directly to vial-duration math. A 5 mg vial covers 5 doses at 1 mg or 2.5 doses at 2 mg — one week or three days respectively. That's a much faster cadence than CJC-1295 or ipamorelin, where a 2 mg vial covers 4+ weeks at typical doses.

Refill planning has to match the cadence. Single-vial orders make sense for monthly peptides; tesamorelin needs 4-vial monthly orders to avoid weekly shipping pressure. Stability is never the binding constraint — the vial empties in days, well inside the 4-6 week window. The constraint is supply, and ordering ahead is the only way to keep daily cadence smooth.

Storage and shelf life for Tesamorelin

Prior to use, lyophilized Tesamorelin powder inside sealed vials should be stored under refrigeration. Once the peptide is reconstituted with a diluent like bacteriostatic water, the resulting solution is likewise kept in a refrigerated environment. Individuals who track their use often document the date of reconstitution directly on the vial label to monitor the solution's in-use timeframe.

How the Tesamorelin vial duration calculator works

A 5 mg tesamorelin vial covers 5 daily doses at 1 mg or 2.5 daily doses at 2 mg. That's roughly 1 week per vial — one of the fastest-emptying schedules in the GH-secretagogue family. Plan refills weekly, not monthly.

The formula is two divisions. Total doses per vial equals vial mg divided by dose mg, rounded down. Weeks of supply equals total doses divided by doses per week. With a 5 mg vial of Tesamorelin, a 1 mg dose, and 7 dose per week, the vial covers 5 doses, or about 0.7 weeks of supply.

The three inputs that move the answer: vial mg (set when you bought the vial), dose mg (set by your protocol step), and doses-per-week (set by the peptide's half-life). Once a vial is reconstituted it also has a stability ceiling — most lyophilized peptides reconstituted in BAC water are typically used within four to six weeks of refrigerated storage, so a vial that mathematically lasts twelve weeks may not last twelve weeks in practice.

Common Tesamorelin vial-planning mistakes

Attempting to reconstitute a 5 mg vial with an excessively small diluent volume, making the large 1 mg dose difficult to measure and draw accurately.
Failing to distinctly log the molecule as tesamorelin, instead using the generic term 'GHRH', which obscures the critical stability difference in protocol review.

Frequently asked questions about Tesamorelin vial duration

How does the Tesamorelin vial duration calculator estimate weeks of supply?

It floors total doses (vial mg ÷ dose mg) then divides by doses per week. For this Tesamorelin example — a 5 mg vial, 1 mg per dose, 7 dose/week — that's floor(5 ÷ 1) ÷ 7 = about 0.7 weeks. Flooring matters: a partial dose left in the vial doesn't count. Tesamorelin's 1-week vial life means stability never bites — you'll always finish inside the 4-6 week window.

Should I plan refills around the math, or around stability?

Whichever runs out first. Math says Tesamorelin at the example dose lasts the calendar weeks shown above. Stability says most reconstituted peptides are typically used within 4–6 weeks of refrigerated storage regardless of how much liquid is left. If the math says 12 weeks but stability caps at 5, plan around 5 — and reconstitute the next vial with less water so you finish it in the stability window. Tesamorelin's 1-week vial life means stability never bites — you'll always finish inside the 4-6 week window.

Does titrating the Tesamorelin dose up shorten vial life?

Yes, often dramatically. Doubling the dose halves the doses-per-vial. The calculator shows real-time how a step-up changes the weeks-of-supply line, so you can re-time refill orders before a titration event rather than discovering the gap mid-protocol. Tesamorelin's 1-week vial life means stability never bites — you'll always finish inside the 4-6 week window.

What if I take Tesamorelin less often than the default cadence here?

Drop the doses-per-week field. With 7 dose/week the example vial lasts about 0.7 weeks; halving the cadence roughly doubles that, but you'll hit the stability ceiling first. A vial that mathematically covers 16 weeks rarely covers 16 weeks in practice. Tesamorelin's 1-week vial life means stability never bites — you'll always finish inside the 4-6 week window.

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