I used to track reconstitution maths on scraps of paper and in a notes app, which made it easy to lose the thread between vials. Writing the numbers down properly – vial contents, bacteriostatic water added, the resulting concentration, and what that means in units on the syringe – turned out to matter more than any single calculation.

What helps most is logging the dose right after taking it, not later from memory. A dated log makes patterns visible: how long a vial actually lasts, when a titration step happened, and whether a side effect lines up with a change.

If you keep notes like this, keep them boring and consistent. Same fields every time, same units, no shorthand you will not understand in three months.