Keeping a supply calendar so you never discover a problem on dose day

Keeping a supply calendar so you never discover a problem on dose day

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Running out is rarely a surprise in hindsight. It is nearly always visible weeks ahead if anybody is looking, and the reason nobody is looking is that supply lives in one place, dosing lives in another, and the two are never put on the same page.

A supply calendar fixes that with three numbers. How much you have on hand, how much you use per week at your current dose, and how long a refill takes to arrive. Divide the first by the second and you get the date you run dry. Subtract the third and you get the date you must actually order by. That second date is the one worth putting in a calendar.

The complication is titration. Your weekly consumption is not constant, so a projection made at a low dose quietly becomes wrong the moment you step up. A vial that covers six weeks at one dose may cover three at the next. If you plan to increase, run the projection at the dose you are moving to, not the one you are on.

Lead time deserves more respect than it usually gets. Pharmacy stock, prescription renewal and shipping are three separate delays that can stack. Two weeks of buffer sounds generous until a renewal needs an appointment and the appointment is a fortnight out.

I keep the projection alongside the dose history in a Peptide Tracker & Calculator so the run-out date updates itself when the dose changes, rather than sitting frozen at whatever I calculated in January. A stale projection is worse than none, because you trust it.

One more entry worth keeping: the date you placed the last order and the date it arrived. After three or four refills you stop guessing at lead time and start knowing it.

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