What Is Known About Tirzepatide Overdose
A Mounjaro overdose means receiving a dose of tirzepatide above what your prescriber has directed — this can happen through a miscalculation, an accidental double injection, or a pen device used incorrectly. The same principles apply to semaglutide (Wegovy); a Wegovy overdose should be treated with the same urgency.
Why overdose carries real risk
Tirzepatide acts on GLP-1 and GIP receptors involved in blood-sugar regulation and appetite. According to information held in the electronic Medicines Compendium (eMC), which publishes the official Summary of Product Characteristics for Mounjaro, there is no specific antidote for tirzepatide. Management of an overdose is supportive and must be guided by a healthcare professional based on the individual's symptoms and circumstances.
Symptoms that may occur
Reported effects associated with excessive dosing can include pronounced nausea, vomiting, low blood sugar (particularly in people also taking insulin or other diabetes medicines), and significant gastrointestinal distress. For a fuller picture of symptoms that may follow a Mounjaro overdose, including what to watch for and when to seek help, see our dedicated page.
Act immediately — do not wait
If you believe you or someone else has taken too much Mounjaro or Wegovy, contact a healthcare professional, your local emergency services, or a poisons information service without delay. Do not attempt to manage the situation yourself and do not take a second dose to compensate. Any concern about dose errors should also be reported through your national pharmacovigilance scheme (such as the UK Yellow Card scheme) and discussed with your prescriber.
Dose decisions on Mounjaro — including the titration schedule — are always led by your prescriber. If you are uncertain about where you are in your dose schedule, see our overview of managing your Mounjaro dose journey, or read about staying at a lower dose stage and moving between dose stages for context on how titration generally works — all decisions remain with your prescriber.
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How Accurate Dose Logging Helps Prevent Errors
One of the most practical steps you can take to reduce the risk of accidental double-dosing is keeping a precise, timestamped record of every injection. GLP Trackr is built for exactly this.
The app's dose logging feature lets you record each injection the moment you give it — the date, time, and dose strength — so there is never any ambiguity about whether this week's shot has been taken. If you are ever unsure, you can open the app and see at a glance. A clear log also means you can bring an accurate account of your injection history to any clinical appointment or urgent consultation, which is exactly the kind of information a healthcare professional needs when assessing a potential overdose situation.
GLP Trackr also sends dose reminders so a weekly injection is less likely to be missed or accidentally repeated, and stores your history in one place so you can review patterns over time.
GLP Trackr is a tracking tool — it is not a substitute for clinical advice, and it cannot tell you what to do in a medical emergency. If symptoms are severe, persistent, or worrying after any injection, contact your healthcare professional promptly. Any uncertainty about your dose always belongs with your prescriber, not with an app.
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Frequently asked questions.
Yes. Taking more tirzepatide than your prescriber has directed is considered an overdose and carries genuine risk, including nausea, vomiting, and low blood sugar. There is no specific antidote; management must be guided by a healthcare professional. Contact emergency services or a doctor immediately if you suspect an overdose.
Contact a healthcare professional, your local emergency services, or a poisons information service without delay. Do not attempt to treat the situation yourself. Bring your dose log if you have one — it helps clinicians understand exactly what was taken and when.
Both Wegovy (semaglutide) and Mounjaro (tirzepatide) are prescription-only GLP-1 medicines with no specific antidote for overdose. A suspected Wegovy overdose should be treated with the same urgency: contact a healthcare professional or emergency services immediately and follow their guidance.
A possible double dose is a medical question for your prescriber or doctor, not something to manage yourself. Contact them promptly and describe exactly what happened. Keeping a timestamped dose log in an app like GLP Trackr can help you give an accurate account of your injection history.
Logging every injection immediately after you give it — including the date, time, and dose strength — removes uncertainty about whether a dose has been taken. GLP Trackr's dose logging and reminder features are designed to help people on weekly injectable medicines stay accurate and consistent.