TB-500 Calculator
Convert a dose of TB-500 into syringe units. Enter the vial size, the bacteriostatic water added and the dose on your prescription.
Enter the vial size and the water you added.
Arithmetic only. This tool does not recommend a dose; use the one your prescriber gave you.
About TB-500
TB-500 is a synthetic peptide related to thymosin beta-4.
Not FDA-approved for any use.
TB-500 concentration chart
Concentration for common vial sizes at 1, 2, 3 and 5 mL of water, with the amount held in every 10 units of a U-100 syringe.
| Vial | 1 mL water | 2 mL water | 3 mL water | 5 mL water |
|---|---|---|---|---|
| 2 mg | 2 mg/mL · 0.2 mg (200 mcg) per 10 units | 1 mg/mL · 0.1 mg (100 mcg) per 10 units | 0.6667 mg/mL · 0.06667 mg (66.67 mcg) per 10 units | 0.4 mg/mL · 0.04 mg (40 mcg) per 10 units |
| 5 mg | 5 mg/mL · 0.5 mg (500 mcg) per 10 units | 2.5 mg/mL · 0.25 mg (250 mcg) per 10 units | 1.667 mg/mL · 0.1667 mg (166.7 mcg) per 10 units | 1 mg/mL · 0.1 mg (100 mcg) per 10 units |
| 10 mg | 10 mg/mL · 1 mg per 10 units | 5 mg/mL · 0.5 mg (500 mcg) per 10 units | 3.333 mg/mL · 0.3333 mg (333.3 mcg) per 10 units | 2 mg/mL · 0.2 mg (200 mcg) per 10 units |
Units per 1 mg of TB-500
How many units on a U-100 syringe hold 1 mg, for each vial size and water volume. 1 mg is a round reference amount for scaling, not a dose: multiply or divide to match the dose on your prescription, or use the calculator.
| Vial | 1 mL water | 2 mL water | 3 mL water | 5 mL water |
|---|---|---|---|---|
| 2 mg | 50 units | 100 units | 150 units · over 1 mL | 250 units · over 1 mL |
| 5 mg | 20 units | 40 units | 60 units | 100 units |
| 10 mg | 10 units | 20 units | 30 units | 50 units |
Questions
How do I calculate TB-500 units on a syringe?
Divide the mg in the vial by the mL of water added to get mg/mL. Divide your prescribed dose by that figure for mL, then multiply by 100 for units on a U-100 syringe. For example, a 5 mg vial with 2 mL of water is 2.5 mg/mL, so every 10 units holds 0.25 mg (250 mcg).
How many units is 1 mg of TB-500?
It depends on the vial size and the water added. With a 5 mg vial, 1 mg is 20 units after 1 mL of water, 40 units after 2 mL of water, 60 units after 3 mL of water. The lookup table above covers the other vial sizes.
Is TB-500 measured in mg or mcg?
TB-500 vials are labelled in mg. If your prescription is written in mcg, divide by 1,000 to get mg, or switch the dose field to mcg. In a 5 mg vial mixed with 2 mL, one unit on the syringe holds 0.025 mg (25 mcg).
How much bacteriostatic water do I add to TB-500?
Follow the amount on your pharmacy label. The volume of water does not change how much TB-500 is in the vial; it only changes how many units a given dose takes up. Enter whatever amount was actually added.
What TB-500 dose should I enter?
The dose written on your prescription. This page converts a dose into syringe units and does not recommend one.
Related conversions
- 10 units to mg
- 50 units to mg
- 25 units to mL
- 0.3 mL to units
- mcg to mg
- mg/mL to units chart
- All conversions
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