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[Discussion] we are measuring units at the wrong time and calling it noise
we are measuring units at the wrong time and calling it noise. Not a hot take, just something I have not seen said plainly here. Adding more water does not change how much peptide is in the vial. It changes the concentration, which changes the volume you draw for the same amount. That is the entire relationship. Why…
Corrected the concentration in the title, which contradicted the body. Nothing else touched.
units are a volume on a U-100 syringe, not a dose
Careful — that arithmetic is wrong. 5mg in 2mL is 2.5mg/mL, so 2mg draws to 80 units, not what you wrote.
5mg into 3mL is 1.67mg/mL, and 1.5mg of that is 90 units
Show the arithmetic — where did the unit figure come from?
do the arithmetic before you reconstitute, not while holding a syringe