Wegovy is semaglutide, taken as an injection once a week, and licensed for weight management. Because it is weekly rather than daily, a single missed or shifted day can be harder to notice than it would be with a daily medicine — there is no next morning to catch it, only the following week, by which point the memory of exactly what happened has usually faded.

That makes a simple record of your injection day more useful than it might sound. It is not about discipline or willpower, and it is not a score to keep. It is about having an accurate answer, later, to a question like 'when did I actually last inject?' rather than relying on a rough sense of it that may or may not be right.

Choosing and recording a day

Most people pick a day of the week that fits their routine — a day off work, a day with fewer commitments, or simply the day they started — and aim to keep injecting on or near that day. What matters for your own records is not which day you chose, but whether you can see, at a glance, what actually happened each week rather than what was supposed to happen.

  • The day you planned to inject that week
  • The day you actually injected
  • The approximate time of day, if that varies for you from week to week
  • Any note about why a day moved, if it did — travel, illness, a forgotten pen, a change of routine, or anything else worth remembering later

Writing the actual date next to the planned date, week after week, turns a vague sense of 'I'm usually pretty consistent' into something you can actually check, months later, without relying on memory alone.

Noticing drift

Small shifts add up. An injection that moves from Monday to Wednesday one week, and then to Friday the next, can drift a long way from where it started without ever feeling like a big change in the moment, because each individual shift seems small and reasonable on its own. A simple weekly log makes that pattern visible, which is useful information to bring to a review appointment even if nothing about it needs to change — a prescriber reviewing your treatment benefits from an accurate picture, not a tidy one.

A log can also help you notice the opposite problem: a routine that looks consistent from memory but, once written down, turns out to have several longer gaps than you remembered. Neither pattern is something this page will judge; the point is simply to know which one actually describes your last few months.

What this page will not tell you

This is a recordkeeping page, not a source of instructions for what to do if a dose is missed, delayed, or taken early. Those situations depend on individual circumstances, how long it has been since your last dose, and other factors that are covered in the patient information leaflet that comes with your Wegovy pen, or by asking your prescriber or pharmacist directly.

If you are ever unsure what to do about a specific missed or delayed injection, the safest step is to ask, rather than guess or follow advice you have seen online or from someone else's routine. Keeping a clear weekly record simply makes that conversation easier when you have it, because you can describe exactly what happened rather than approximating it.

Fitting a log into a routine you already have

You do not need a dedicated app or a complicated system for this. A single line added to a calendar, a notes app, or a paper diary each week is enough, provided you actually update it at the time rather than trying to fill it in retrospectively from memory a fortnight later. Some people find it easiest to log the injection the moment it happens, before moving on with the day, so it never gets forgotten or blurred together with other weeks.

If you already keep any kind of health or medication diary, adding a single weekly line for Wegovy is a small addition rather than a new habit to build from scratch. The goal is not a perfect system — it is a record accurate enough that you can trust it months from now, when memory alone would not be enough.