The medication itself isn't the only thing that needs tracking. Needles, sharps disposal, alcohol wipes, plasters — every one of them can run out at the wrong moment, and every one of them is a thing that quietly disrupts the routine when it does. Running out of needles on a Saturday night with the pharmacy shut is a real situation, and the only thing that prevents it is checking before you need to.
The fix is a two-minute Sunday kit check, slotted into the same weekly review where you log the dose. Count needles. Look at the sharps bin and judge whether it's going to need a swap before the next review.
Glance at the wipes, the plasters, the spare pen if you carry one. Note any of them low. The point isn't precision — it's lead time.
If you see "needles: 7 left" on Sunday, you've got six weeks to reorder before it matters. If you see it at zero on a Saturday night, you don't. The same applies to repeat prescriptions — knowing the date your last pen was dispensed, plus a rough idea of how long the script lasts you, tells you when to ask the prescriber.
Titra has a notes field and tags, and using one tag for the kit check means you can scroll back across months and see whether the supply rhythm matches the dose rhythm. Boring infrastructure work that pays for itself the first time you don't get caught short.