–
Arithmetic on the numbers you enter. Check the result against your label and ask your prescriber. Reko does not suggest doses, and this is not medical advice.
How it works
Units = dose ÷ concentration × 100. If the old vial can't cover the dose, the rest is worked out at the new vial's strength. These are two separate draws, because the two liquids are not interchangeable unit for unit.
In the app
Reko logs each dose against the vial it came from and counts down what is left.