If you miss your weekly injection, the rule depends on the drug. Semaglutide (Ozempic, Wegovy): generally take the missed dose if it's within about 5 days; if longer, skip it and resume on your usual day. Tirzepatide (Mounjaro, Zepbound): generally take it within about 4 days, otherwise skip. Never double up to make up a missed dose. These windows come from the product labels, so confirm yours and follow your prescriber.
Key takeaways
- Semaglutide: take a missed dose within ~5 days, otherwise skip.
- Tirzepatide: take a missed dose within ~4 days, otherwise skip.
- Never double up — two doses close together means more side effects, not faster results.
- After a long gap, ask your clinician whether you need to restart at a lower dose.
First, don't double up
The single most important rule applies to every GLP-1: never take two doses to catch up. Taking a missed dose right before or alongside your next scheduled one stacks the medication and sharply raises the odds of nausea, vomiting and other gastrointestinal effects — with no added benefit. Whatever drug you're on, the choice is always "take one dose within the allowed window" or "skip it," never "take extra."
The exact window depends on which molecule you take, so find your drug below. If you're not sure which category yours falls into, our medications guide lists every approved product and its active ingredient.
Semaglutide: Ozempic & Wegovy
Ozempic and Wegovy are both semaglutide, a once-weekly injection. The general guidance is that if you miss a dose, you can take it as long as your next scheduled dose is more than two days (48 hours) away — which most labels summarize as taking the missed dose within about five days. If more than five days have passed, skip the missed dose entirely and take your next one on your regular scheduled day. After taking a delayed dose, you can also choose to reset your weekly dosing day if needed, as long as doses stay at least two days apart.
Tirzepatide: Mounjaro & Zepbound
Mounjaro and Zepbound are both tirzepatide, also a once-weekly injection. The catch-up window here is slightly shorter: a missed dose can generally be taken within about four days (96 hours). If more than four days have passed, skip it and resume with your next dose on the usual day. As with semaglutide, you can change your weekly dosing day if necessary, provided your doses remain at least three days apart.
| Drug | Active ingredient | Take missed dose within | If past the window |
|---|---|---|---|
| Ozempic / Wegovy | Semaglutide | ~5 days | Skip; resume on schedule |
| Mounjaro / Zepbound | Tirzepatide | ~4 days | Skip; resume on schedule |
After a longer gap
Missing a single week and resuming is usually straightforward. But if you've gone several weeks without your medication — a supply gap, a vacation, a lapse in coverage — don't simply restart at your old dose. Tolerance to GLP-1 side effects fades when you stop, so jumping back to a high dose can bring back strong nausea, much like when you first started. In that situation, contact your clinician: they may have you restart at a lower dose and re-titrate up. Our dosing guide explains how titration works and why easing back in protects you from a rough re-entry.
How to avoid missing doses in the first place
The easiest missed dose is the one that never happens. Because GLP-1s are weekly, they're surprisingly easy to forget compared with a daily pill, so a little structure helps. Pick a consistent day and anchor it to something you already do — "Sunday morning coffee" sticks better than a random date. Set a recurring weekly phone reminder, and consider a second nudge the next morning as a backstop in case life gets in the way.
A few habits also prevent the other common cause of missed doses: running out. Refill early rather than on your last pen, keep an eye on insurance coverage and prior-authorization renewals so the pharmacy isn't a surprise, and store your pens correctly so none go to waste. Many pharmacies and pharmacy apps can text you when a refill is ready, which takes the memory load off you entirely. If travel is coming up, plan how you'll keep your pen cool and on schedule. Our dosing guide covers storage and timing in more detail.
Whatever your drug and however long the gap, the label that came with your pen is the final word — these windows are taken directly from manufacturer instructions, and your prescriber can tailor them to you.
Frequently asked questions
What should I do if I miss my weekly GLP-1 dose?
It depends on the drug. Semaglutide (Ozempic, Wegovy): generally take the missed dose within about 5 days, otherwise skip. Tirzepatide (Mounjaro, Zepbound): generally take it within about 4 days, otherwise skip and resume your normal day. Always follow the label and your prescriber.
How late can I take a missed GLP-1 dose?
Roughly 5 days for semaglutide and 4 days for tirzepatide. Past that window you skip the dose rather than taking it too close to the next one. These come from the product labels — check yours.
Can I take two doses to catch up?
No — never take two doses at once or on back-to-back days to catch up. Doubling up sharply raises the risk of nausea and vomiting with no benefit. Take one dose within the allowed window, or skip it.
Sources & further reading
- U.S. Food & Drug Administration — prescribing information and medication guides for Ozempic, Wegovy, Mounjaro and Zepbound.
- Novo Nordisk and Eli Lilly product labeling — missed-dose instructions for semaglutide and tirzepatide.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) — incretin therapies.