People using GLP-1 medications (semaglutide, tirzepatide) and related peptides benefit from keeping a consistent dose log. Here is what is worth recording and the reconstitution math that trips people up.
What to record for each dose #
- Date and time — anchors half-life and next-dose timing
- Amount, in one consistent unit (avoid mixing mg and units)
- Injection site — rotate and note it
- Batch / vial — helps trace issues across supply
Reconstitution math #
For vialed or compounded peptides, the common question is how many syringe units a target dose needs, given the vial strength and the bacteriostatic water added. It is easy to get wrong, so a calculator helps.
A free tool #
I have been using glp1.app — a free, no-signup web app that handles injection logging, titration schedules, medication half-life, and the reconstitution/dose math above. It runs in any browser with nothing to install. The GLP-1 dose calculator takes vial mg + BAC water + target dose and returns exact syringe units.
This is an organization tool, not medical advice — follow your prescriber's instructions.