What happens if you miss your GLP-1 shot (and what to do next)
It happens to almost everyone eventually: shot day comes and goes, and you only realize the next morning. Before anything else — don’t panic, and don’t double-dose. Here’s what actually matters.
What the labels say
The general guidance from the prescribing information (always confirm with your own prescriber):
- Semaglutide (Ozempic, Wegovy): take the missed weekly dose as soon as possible within 5 days. If more than 5 days have passed, skip it and take your next dose on the regular day.
- Tirzepatide (Mounjaro, Zepbound): take it as soon as possible within 4 days. Past that, skip and resume your normal schedule.
Never take two doses to “catch up”, and if you’re unsure — especially if you’ve missed more than one dose — call your prescriber or pharmacist.
What happens to your medication level
Weekly GLP-1 medications have long half-lives: roughly 7 days for semaglutide, about 5 for tirzepatide. That’s by design — it’s what makes once-weekly dosing work. It also means a single late shot doesn’t send your level to zero. Instead, your level dips deeper than its usual weekly trough, then recovers after your next dose.
That dip is why a late week can feel different: appetite often returns earlier and stronger, and some people notice the “shot day reset” of side effects more sharply after restarting.
Miss several weeks, though, and levels fall far enough that your prescriber may want to restart you at a lower dose to avoid a wave of side effects. This is exactly the scenario the labels’ “talk to your provider” language is about.
Why people actually miss shots
In practice, missed shots are rarely about forgetting the medication exists. The common patterns:
- The deferred shot. You see the reminder at a busy moment, swipe it away, and the day ends.
- The schedule drift. Travel or a weekend shifts the day, and the new “shot day” never quite gets anchored.
- The supply gap. The pen ran out and the refill wasn’t ready.
All three are systems problems, not willpower problems — which means systems fix them.
Making missing structurally hard
A reminder you can swipe away is a suggestion. What works better is changing the default: ShotLock arms an app block at shot time — your distracting apps stay locked until you log your dose. The reminder becomes un-ignorable without being loud, because the path of least resistance now runs through the shot.
Pair that with supply tracking that warns you before the last dose, and the two biggest causes of missed shots disappear from your life.
This article is general information, not medical advice. Always follow your prescriber’s instructions for missed doses.