Short answer: it depends on which product you take and, for some, on when your next dose is due. You should never take a double dose to catch up — that rule holds no matter which GLP-1 medication you're on. Each FDA-approved product's label sets its own rules for what to do for a missed dose; compounded preparations follow the instructions on your own pharmacy label instead. When you're not sure which applies to you, message your care team rather than guessing.
The one-line version
Take a missed weekly dose as soon as you remember, but only within your product's window:
- Wegovy® injection: if your next scheduled dose is more than 2 days (48 hours) away
- Zepbound® or Mounjaro®: within 4 days (96 hours) of the missed dose
- Ozempic® injection: within 5 days of the missed dose
Otherwise, skip it and take your next dose on your regular day. Never double up, and never guess at a compounded prescription's window. Check your pharmacy label or ask your clinician.
What's the general rule if I miss a dose?
Every FDA-approved GLP-1 injection follows the same basic shape, even though the exact guidance differs by product. If you're still within your product's window, take the missed dose as soon as you remember, then resume your usual weekly schedule. If you're past it, skip the missed dose and take your next dose on your regular day. Don't take it late, and don't add it on top of your next dose.
How the window is measured differs slightly. Ozempic®, Zepbound®, and Mounjaro® count days since the missed dose. Wegovy® looks at how far away your next dose is.
The logic behind the window is pharmacological, not arbitrary. Semaglutide's half-life is about 1 week and tirzepatide's is about 5 days, which is why these medicines are injected once weekly. The product labels also set a minimum gap between doses when you change your dose day: at least 2 days for Ozempic® and Wegovy®, and at least 3 days (72 hours) for Zepbound® and Mounjaro®.
How long do I have, by product?
These rules come directly from each product's FDA-approved prescribing information. They aren't interchangeable between products, even between two that share the same active ingredient.
| Medication | Take the missed dose if… | Skip the missed dose if… |
|---|---|---|
| Wegovy® injection (semaglutide) | Your next scheduled dose is more than 2 days (48 hours) away | Your next scheduled dose is less than 2 days (48 hours) away |
| Ozempic® injection (semaglutide) | It has been 5 days or fewer since the missed dose | It has been more than 5 days since the missed dose |
| Zepbound® (tirzepatide) | It has been 4 days (96 hours) or fewer since the missed dose | It has been more than 4 days (96 hours) since the missed dose |
| Mounjaro® (tirzepatide) | It has been 4 days (96 hours) or fewer since the missed dose | It has been more than 4 days (96 hours) since the missed dose |
Notice that Wegovy® and Ozempic® — both semaglutide, both made by Novo Nordisk — carry different windows. So do Zepbound® and Mounjaro®, even though both are tirzepatide from Eli Lilly and share the same 4-day window in this case.
It's worth pointing out that missed doses of daily tablets work differently. For Wegovy® and Ozempic® oral tablets, there is no late window. If you miss a tablet, skip it and take your next tablet the following day. Never take two doses in one day to catch up.
The takeaway: check the guidance for the specific product you were prescribed, not just its active ingredient.
What about compounded semaglutide or tirzepatide?
Compounded medications are prepared on a per-patient basis by US-licensed compounding pharmacies, regulated under federal law (FDCA §503A) and by state boards of pharmacy. While these pharmacies are highly regulated, the compounded medications themselves are not FDA-approved, are not generic versions of brand-name drugs, and have not been evaluated by the FDA for safety, efficacy, or quality. Clinical trial outcomes for the FDA-approved products have not been established for compounded preparations. Individual results vary.
The windows above are specific to the FDA-approved brand products and come from their FDA-approved labeling. Compounded semaglutide and tirzepatide are prepared per-patient by compounding pharmacies, and missed-dose guidance isn't standardized the same way across every preparation — a compounded oral tablet, a standard injection, and a microdose injection can carry different instructions from the pharmacy that prepared them. Check the label and paperwork that came with your prescription, and if it's not clear, message your care team or call your pharmacy before deciding whether to take a late dose. Don't assume a brand-name window listed above applies to your compounded prescription.
Is it ever okay to double up?
No — not on any GLP-1 product, brand-name or compounded. Taking two doses close together to "make up" for a missed one doesn't restore lost progress; it just means significantly more medication in your system at once than your body has adjusted to, which typically means noticeably worse nausea, vomiting, or other GI side effects. If you've missed a dose and you're past the window for taking it late, the right move is always to wait for your next regularly scheduled day at your normal dose. Don't inject early, and don't inject twice.
What if I've missed more than one dose in a row?
A single missed dose, handled within the window (or skipped if you're past it), usually doesn't change anything about your plan. Missing two or more weeks in a row is different — the tolerance your body built up during titration can fade the longer a dose gap runs, and a full-strength dose after a longer gap can hit harder than it did before. Don't restart on your own at whatever dose you were previously taking. Contact your provider, describe how long it's been, and let them decide whether to resume where you left off or step back down and re-titrate. Our guide on restarting semaglutide after a break covers why clinicians often restart lower rather than picking up where you stopped.
When should I contact my provider about a missed dose?
Reach out if any of these apply:
- You've missed two or more doses in a row, or you're not sure how long it's actually been.
- You're not sure which window applies to your medication — brand or compounded, and which specific product.
- You already took a dose late and are now unsure when your next one should be — your clinician can confirm the right day to get you back on a clean weekly schedule.
- A missed dose was due to side effects (like vomiting or severe nausea) rather than simply forgetting — that's worth mentioning on its own, since it may affect your titration pace.
Where Pallas fits
Every Pallas patient has a direct line to their care team to ask exactly this kind of question — no appointment required to confirm whether it's safe to take a dose late or better to wait for the next one. If you're newly starting GLP-1 therapy and want a US-licensed clinician to review your history and set expectations for dosing before you begin, that happens during intake. Eligibility is determined by a US-licensed clinician.
For more on the early weeks of treatment, see our guides to GLP-1 side effects and your first three months on a GLP-1, or what to do if you throw up after a dose. If you're checking whether care is available where you live, see our state-by-state GLP-1 availability directory.
Bottom line: If you miss a GLP-1 dose, the fix depends on your specific product. Take it if you're within your label's rule (Wegovy® injection: next dose more than 2 days away; Zepbound® or Mounjaro®: within 4 days; Ozempic® injection: within 5 days), or skip it and resume your normal schedule. For daily Wegovy® or Ozempic® tablets, skip a missed tablet and take the next one the following day. Compounded preparations follow your pharmacy's own instructions instead. Whatever you're on, never double up, and contact your provider if you've missed more than one dose or aren't sure what to do.
