Fiala
TB-500 5 mg vial: mixing & syringe guide
How much bacteriostatic water to add to a 5 mg TB-500 vial, what each mark on a U-100 insulin syringe holds, and how long the vial lasts at your dose.
Syringe simulator
Enter the dose your clinician has prescribed. This only converts units. It doesn't recommend doses.
Mixing table for a 5 mg vial
What each mark on a U-100 insulin syringe holds. With 2 mL of water, for example, the vial holds 2.5 mg/mL, so every unit is 25 mcg and 10 units is 250 mcg.
| Water | Strength | 1 unit | 10 units |
|---|---|---|---|
| 1 mL | 5 mg/mL | 50 mcg | 500 mcg |
| 2 mL | 2.5 mg/mL | 25 mcg | 250 mcg |
| 3 mL | 1.667 mg/mL | 16.67 mcg | 166.67 mcg |
| 5 mL | 1 mg/mL | 10 mcg | 100 mcg |
More water doesn't change the dose, only how much liquid holds it. It makes small doses easier to measure. On a U-100 syringe, 100 units = 1 mL.
How to mix a TB-500 vial
- Wash your hands. Wipe the tops of the peptide vial and the water vial with an alcohol swab and let them dry.
- Draw up the amount of bacteriostatic water you've chosen with a fresh syringe.
- Push the needle through the rubber top and let the water run slowly down the inside wall, not straight onto the powder.
- Swirl or roll the vial gently until the powder dissolves. Don't shake it.
- Label the vial with the date and strength, and keep it in the fridge.
- Use a new sterile syringe for every dose, and never share needles.
About TB-500
How it's taken: Injection under the skin or into muscle (popular use)
How long it lasts (half-life): Not established in humans
Storage: Unreconstituted (powder) vials are usually kept refrigerated or frozen and away from light. Once mixed with bacteriostatic water, keep refrigerated and do not freeze; follow the supplier's stated beyond-use date.
Other TB-500 vial sizes
Track your TB-500 vial privately
Fiala is a free app that does this maths for any vial, logs your doses, counts down what's left in each vial and reminds you when a dose is due. No account, and everything you log stays on your phone.
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