Short answer: it depends on how many days have passed and which product you take, but 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 an exact window for taking a missed dose late before you should just skip it and resume your normal schedule; 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 dose as soon as you remember, but only within your product's window: within 2 days for Wegovy®, within 4 days (96 hours) for Zepbound® or Mounjaro®, or within 5 days for Ozempic®. If more time has passed, 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 number of days differs by product: if it's still within your product's window, take the missed dose as soon as you remember, then resume your usual weekly schedule from there. If the window has passed, skip the missed dose entirely and wait for your next regularly scheduled day — don't take it late, and don't add it on top of your next dose.
The logic behind the window is pharmacological, not arbitrary. These medications are designed to be released and cleared gradually over about a week, so there's a stretch of days where taking the dose a bit late still keeps you roughly on schedule — and a point past which it makes more sense to just wait for the next one than to inject two doses close together.
How long do I have, by product?
These windows 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 | Window to take a late dose | If more time has passed |
|---|---|---|
| Wegovy® (semaglutide) | Within 2 days (48 hours) | Skip it; resume your normal schedule |
| Ozempic® (semaglutide) | Within 5 days | Skip it; resume your normal schedule |
| Zepbound® (tirzepatide) | Within 4 days (96 hours) | Skip it; resume your normal schedule |
| Mounjaro® (tirzepatide) | Within 4 days (96 hours) | Skip it; resume your normal schedule |
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. 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 four 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.
Already a Pallas patient?
Message your care team directly through the patient portal if you're unsure whether to take a late dose — no appointment needed.
Go to your patient portal →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 for a day or two. 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 — not to inject early, and not to 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.
Frequently asked questions
It depends on your specific product. If you're still within your product's window, take the missed dose as soon as you remember and resume your normal weekly schedule from there. If more time has passed than your product's window allows, skip the missed dose entirely and take your next dose on your regular day — never take it late past the window, and never double up.
Up to 5 days after the missed dose, per Ozempic®'s FDA-approved prescribing information. If more than 5 days have passed, skip the missed dose and take your next dose on your regularly scheduled day.
Wegovy®'s prescribing information gives a 2-day (48-hour) window. Zepbound® and Mounjaro® — both tirzepatide — each give a 4-day (96-hour) window. In every case, if the window has passed, skip the missed dose and resume your normal weekly schedule rather than taking it late.
Not necessarily. Those windows come from the specific FDA-approved brand labels and aren't standardized across compounded preparations, which are prepared per-patient by compounding pharmacies. Check the instructions and label that came with your compounded prescription, and message your care team or pharmacy if it isn't clear — don't assume a brand-name window applies to your medication.
No, on any GLP-1 product. Doubling up doesn't restore anything you missed — it just means notably more medication in your system than your body has adjusted to, which usually means worse nausea or GI side effects. If you're past the window for taking a dose late, wait for your next regularly scheduled day instead.
Contact your provider rather than restarting on your own. Tolerance built up during titration can fade the longer a gap runs, so a full-strength dose after missing several weeks can hit harder than it used to. Your clinician will decide whether to resume at your prior dose or step back down and re-titrate.
References
- U.S. Food and Drug Administration. WEGOVY® (semaglutide) prescribing information. 2026.
- U.S. Food and Drug Administration. OZEMPIC® (semaglutide) prescribing information. 2026.
- U.S. Food and Drug Administration. ZEPBOUND® (tirzepatide) prescribing information. 2026.
- U.S. Food and Drug Administration. MOUNJARO® (tirzepatide) prescribing information. 2026.
Bottom line: If you miss a GLP-1 dose, the fix depends on your specific product — take it within your label's window (2 days for Wegovy®, 4 days for Zepbound® or Mounjaro®, 5 days for Ozempic®) or skip it and resume your normal schedule. 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.
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