Semaglutide Overdose and Missed Dose: What the Label Says
Ozempic and Wegovy's own overdose and missed-dose instructions, verbatim in substance, plus FDA's dosing-error warnings on compounded semaglutide.
The short version
Ozempic and Wegovy (semaglutide) each carry FDA-approved instructions for a missed dose and for an overdose. A missed dose has a window in which you take it late; after that you skip it. An overdose is managed with supportive care and Poison Control, not a specific antidote, because semaglutide stays in the body for about a week. Separately, FDA has documented hundreds of adverse event reports tied to dosing errors in compounded semaglutide. This page covers the approved label and why the compounded supply carries extra risk.
- Ozempic: take a missed dose within 5 days; after that, skip it and resume the regular schedule.
- Wegovy: take a missed dose if the next one is more than 2 days away; otherwise skip it.
- Overdose management is supportive care, with no specific antidote, and the label says to consider calling Poison Control.
- FDA has logged 990 adverse event reports tied to compounded semaglutide specifically, many linked to dosing errors.
- Call 911 for severe symptoms; call Poison Control at 1-800-222-1222 for a suspected overdose that is not an emergency.
Semaglutide is sold as two FDA-approved injectable products, Ozempic and Wegovy. Each has its own label, and each label answers “what if I miss a dose?” and “what about an overdose?” directly. This page gives those answers, plus what FDA has separately said about dosing errors in the compounded supply. It is not instructions for a compounded or “research” vial, which has no approved label at all.
US legal status - FDA-approved · prescription only
Semaglutide is FDA-approved as Ozempic and Wegovy, each requiring a prescriber. A compounded or "research use only" vial is not the approved product and carries its own documented dosing-error risk - see below.
AU legal status - TGA-registered · prescription only
Semaglutide is Schedule 4 of the Poisons Standard - prescription only.
Regulators reach their own conclusions on their own timelines. Where these two disagree, the difference is the point - not an error.
If you miss a dose
| Product | If it’s within the window | If the window has passed |
|---|---|---|
| Ozempic | Take the missed dose as soon as possible, within 5 days | Skip it; take the next dose on the regular day |
| Wegovy | Take it as soon as possible, if the next scheduled dose is more than 2 days (48 hours) away | Skip it if the next dose is less than 2 days away; resume on the regular day |
Wegovy’s label adds an instruction for missing two or more doses in a row: restart the dose escalation at a lower dose, which your prescriber sets. The label’s stated reason is to reduce the risk of gastrointestinal side effects.
What the label says about overdose
Both labels take the same approach to overdose: there is no specific antidote, and management is supportive.
The one-week half-life is why observation can stretch well past the day symptoms start. The drug stays active in the body for days afterward.
FDA’s warning on compounded and grey-market dosing errors
This is a separate, documented problem from the approved-product instructions above. FDA has received reports of adverse events, some requiring hospitalization, that may be related to dosing errors with compounded injectable semaglutide. Patients measured and self-administered incorrect doses, and in some cases health care professionals miscalculated doses.
FDA has also received reports of patients using compounded semaglutide or tirzepatide beyond what the approved label allows. They used more product in a single dose, or increased the amount faster than the approved titration schedule.
As of 31 May 2026, FDA had logged 990 adverse event reports tied to compounded semaglutide, and it says these are likely an undercount. A compounded vial has no FDA-reviewed concentration verification and no pen with a fixed, labelled dose. The approved products have both.
What to do right now
For a suspected overdose that is not causing those signs, call Poison Control at 1-800-222-1222 (US), free and available around the clock. Have the product packaging in hand, including whether it’s an approved pen or a compounded vial, so whoever you speak with knows what was taken.
Related
- Semaglutide: the approved label
- Semaglutide dosage
- Compounded vs. branded semaglutide
- Peptide injection site reactions
Common questions
What happens if I miss a dose of Ozempic?
Ozempic's label says to give the missed dose as soon as possible, within 5 days after the missed dose. If more than 5 days have passed, skip that dose and give the next dose on the regularly scheduled day. Do not double up to make up for it.
What happens if I miss a dose of Wegovy?
Wegovy's label says that if the next scheduled dose is more than 2 days (48 hours) away, take the missed dose as soon as possible. If the next dose is less than 2 days away, skip the missed dose and resume on the regular weekly day. If 2 or more consecutive doses are missed, the label says to restart the dose escalation at a lower dose, to reduce the risk of gastrointestinal side effects.
What does the semaglutide label say about overdose?
Both labels take the same approach: there is no specific antidote. Appropriate supportive treatment should start according to the patient's clinical signs and symptoms. A prolonged period of observation may be necessary, because semaglutide's half-life is about one week. Wegovy's label adds that overdoses of other GLP-1 receptor agonists have caused severe nausea, severe vomiting and severe hypoglycaemia. Both labels say a clinician should consider contacting Poison Control (1-800-222-1222) or a medical toxicologist.
Is compounded semaglutide more likely to cause an overdose?
FDA has documented this. It has received reports of adverse events, some requiring hospitalization, tied to dosing errors with compounded injectable semaglutide. Patients measured and self-administered incorrect doses, and in some cases health care professionals miscalculated doses. FDA has also received reports of patients using compounded semaglutide or tirzepatide beyond the approved label. They used more product per dose, or increased the amount faster than the approved titration schedule. As of 31 May 2026, FDA had logged 990 adverse event reports tied to compounded semaglutide.
What should I do if I think I or someone else has taken too much semaglutide?
Call 911 for severe or rapidly worsening symptoms: severe or persistent vomiting, signs of severe dehydration, fainting, or any symptom that feels dangerous. For a suspected overdose that is not an emergency, call Poison Control at 1-800-222-1222, which is free, confidential and available around the clock. Bring or photograph the product packaging, including whether it is an approved pen or a compounded vial, so a clinician knows what was taken.
Can I take a double dose to catch up after missing one?
No. Neither label says to double up. Each gives a window for taking a missed dose late. Outside that window, skip the missed dose and resume the regular weekly schedule at the normal dose. Do not add it to the next scheduled dose.
References (3 sources)
Bibliographic detail is fetched from PubMed, not written by me - so a citation here cannot drift from the paper it names. Study design comes from PubMed's own tags rather than my judgement.
- 1.WEGOVY (semaglutide) injection - full prescribing information, including Section 2.4 Recommendations Regarding Missed Dose and Section 10 Overdosage.- DailyMed, National Library of Medicinelabel
- 2.OZEMPIC (semaglutide) injection - full prescribing information, including Section 2.1 Important Administration Instructions (missed dose) and Section 10 Overdosage.- DailyMed, National Library of Medicinelabel
- 3.FDA's Concerns with Unapproved GLP-1 Drugs Used for Weight Loss - dosing errors, hospitalizations and adverse event counts for compounded semaglutide and tirzepatide.- US Food and Drug Administrationregulatory