PT-141 Dosage Calculator
Bremelanotide, a melanocortin receptor agonist studied for libido research.
Total amount printed on the vial label.
Changes concentration only — your dose stays the same.
1000 mcg = 1 mg
1 mL barrels are sold marked two ways: 0–100 insulin units (U-100) or 0–1 mL (tuberculin / luer). Same volume — 100 units = 1 mL — so the result below gives you both readings.
1.0 mL (100-unit) · top row = insulin units, bottom row = mL · smallest mark = 2 units · check yours, gradations vary by brand
Show the math — every step, with your numbers
- Concentration: 10 mg ÷ 2 mL = 5.00 mg/mL (5000 mcg/mL)
- Dose volume: 1000 mcg ÷ 5000 mcg/mL = 0.200 mL
- Syringe units: 0.200 mL × 100 = 20 units
How much water should I add?
The same 1000 mcg dose from your 10 mg vial, at each water volume. More water spreads the dose over more units, which is easier to read accurately. Tap a row to use it.
✓ = the draw lands exactly on a mark of your 1.0 mL (100-unit) syringe — no eyeballing between gradations.
Calculated on a U-100 insulin syringe (100 units = 1 mL). This is reconstitution arithmetic for PT-141, not a dosing recommendation. Verify against your product label and a qualified professional.
PT-141 reconstitution chart
Concentration for each vial size when reconstituted with 2 mL of bacteriostatic water. Change the water amount in the calculator to see other concentrations, or open the full reconstitution chart to compare every dose and water volume at once.
| Vial size | Bac. water | Concentration | Per unit (0.01 mL) |
|---|---|---|---|
| 10 mg | 2 mL | 5.00 mg/mL | 50.0 mcg |
About PT-141 dosing
PT-141 (PT-141) is bremelanotide, a melanocortin receptor agonist studied for libido research. It is commonly sold in 10 mg vials. Commonly-cited community and research protocols reference a range of 500–2,000 mcg, used as-needed in cited protocols. A 10 mg vial with 2 mL bac water gives 5 mg/mL; small units cover the common dose range.
Remember that the number of syringe units for any dose depends entirely on how much bacteriostatic water you add. The calculator above is pre-filled with a common setup for PT-141; adjust the inputs to match your own vial and the units update instantly.
Check PT-141 for yourself
The figures on this page are commonly-cited references for the arithmetic, not prescriptions. These are primary, non-commercial sources where you can verify them independently.
- PT-141 studies on ClinicalTrials.gov ↗
Registered human studies, their doses and protocols. If a compound has few or no registered trials, that is worth knowing before relying on any figure.
- PT-141 on PubChem ↗
Chemical identity and molecular weight from the NIH.
PT-141 calculator — FAQ
How do I reconstitute PT-141?+
A 10 mg vial with 2 mL bac water gives 5 mg/mL; small units cover the common dose range. Add your chosen amount of bacteriostatic water to the vial, swirl gently (never shake), and use the calculator above to convert your target dose into insulin-syringe units.
What is a common PT-141 dose?+
Commonly-cited protocols reference 500–2,000 mcg, used as-needed in cited protocols. These are references for the arithmetic, not a prescription — confirm with your product label and a qualified professional.
How many units of PT-141 should I draw?+
That depends on your vial size and how much bacteriostatic water you added. Enter both into the calculator above along with your dose and it shows the exact units on a U-100 insulin syringe.