Missed a semaglutide dose? Here is the rule.
Semaglutide has a forgiving window because of its long half-life — but only up to a point. The cutoff is five days.
The official rule for a missed semaglutide dose, straight from the Wegovy label, is built around the drug's roughly one-week half-life. If you remember within five days of when the shot was due, the dose is still close enough to your normal schedule to take it. Beyond five days, you are close enough to the next scheduled dose that doubling up would push blood levels too high.
This guide gives you the decision flow, the math behind it, and the edge cases that come up most often.
What to do right now
The five-day rule
Less than 5 days late: take it now
Inject your usual dose as soon as you remember. Then resume your regular weekly day next week — your normal schedule does not change.
5 or more days late: skip it
Do not take the missed dose. Wait until your next regular weekly day and inject as normal. Never double up to make up for a missed dose.
How to count: if your usual injection day is Sunday and you forget, you can still take it any time through end-of-day Friday (less than 5 days late). If you remember Saturday morning or later, skip it and inject Sunday as planned.
Why the cutoff is five days
Semaglutide's half-life is about 7 days. That means after one week, half the active drug is still in your bloodstream. With weekly dosing, your levels stay relatively steady — each injection tops up what is still circulating.
Take a dose just two or three days late, and you barely shift the curve. Take a dose six days late and then your next regular dose only one day later, and you double up at the peak. That spike is what causes severe nausea, vomiting, and (rarely) more serious problems.
The five-day cutoff is the sweet spot where the late dose is far enough from the next scheduled one that you do not stack peaks.
Resetting your schedule (the more involved case)
If you have skipped more than one consecutive dose, the rules change:
- Two consecutive missed doses (two weeks gap): Most providers will have you resume at your current dose, but you may experience side effects similar to when you first started. Some recommend stepping back one dose for two weeks before climbing back up.
- Three or more weeks missed: Talk to your provider before resuming. They will typically restart you at a lower dose to re-titrate. Restarting at your previous high dose after a long gap is the classic recipe for severe nausea and vomiting.
- More than four weeks missed: Treat it as a fresh start — re-titrate from 0.25 mg under provider guidance.
The longer you have been off, the more your gut has "forgotten" the drug. Adaptation is real, and it fades.
You can also change your weekly day if needed
If your weekly injection day is consistently inconvenient, you can change it — as long as the last dose was at least 48 hours ago. From the Wegovy label: you may change the day of weekly administration if needed, provided that the time between two doses is at least 48 hours.
This is not the same as making up a missed dose. It is a deliberate schedule shift. After the change, the new day becomes your weekly day going forward.
Common questions
Common Concerns
Can I take a half dose if I am 5+ days late?expand_more
Will missing one dose make me regain weight?expand_more
I missed during titration — do I restart titration?expand_more
What if I took the missed dose 5+ days late by accident?expand_more
Does this same rule apply to Ozempic?expand_more
Keep exploring
Browse all GLP-1 guides or learn about side effects.