Blend calculator
For a vial that holds more than one peptide, enter the amount of each, the water you added and the units drawn. Get the amount of each component in that draw.
Enter the amount of each component in the vial and the water you added.
Arithmetic only. This tool does not recommend a dose or a schedule; use the ones your prescriber gave you.
The formula
Every component is dissolved in the same water, so each has its own concentration and one draw takes all of them in the ratio they have in the vial. A vial with 10 mg of one peptide and 5 mg of another in 2 mL is 5 mg/mL and 2.5 mg/mL, so 10 units holds 0.5 mg of the first and 0.25 mg of the second.
The ratio is fixed when the vial is filled. Drawing more or less changes both amounts together. It cannot change one without the other.
Questions
How do I calculate a dose from a blended vial?
Treat each component separately. Divide its amount by the water added to get its concentration, then multiply by the volume drawn. To go the other way, from a prescribed amount of one component to units, enter that component alone in the reconstitution calculator.
Do I add the components together to get the concentration?
Only if your prescription is written as a total. Labels and prescriptions for blends usually state each component, so the calculator shows each one and the total.
Can I change the ratio between the components?
No. The ratio is set by what is in the vial. Adding more or less water changes the concentration of every component by the same factor.
What if my vial is labelled with one total amount?
Then the label should also state the split between components. If it does not, ask the pharmacy that dispensed it. Without the split, only the total per draw can be calculated.