What to do if you miss a dose of Wegovy or Mounjaro
Official rules for a missed dose of Wegovy or Mounjaro, with differences of 5 and 4 days.
The essentials in less than a minute
- Wegovy and Mounjaro do not have exactly the same window to make up a forgotten dose.
- Wegovy: European information allows you to manage it within 5 days; then it is omitted.
- Mounjaro: the window is 4 days; then it is omitted.
- A dose is never doubled to compensate and, if several have been missed, it is a good idea to consult before restarting.
The difference that matters: 5 days vs. 4
Instructions should be consulted in the package insert for the current presentation, but current European information clearly distinguishes both products.
| Product | If you’re still inside the window | If it has already happened |
|---|---|---|
| wegovy | Administer as soon as possible, within 5 days. | Skip and follow the usual weekly day. |
| Mounjaro | Administer as soon as possible, within 4 days. | Skip and follow the usual weekly day. |
Do not use a double dose
Doubling up does not correct the schedule and may increase the risk of adverse effects. If there is doubt about dates or doses, stop and confirm before injecting.
How to count the days correctly
Count from the day the administration was due, not from the moment you realized it. Note the date and time of the last actual dose. If the window has already passed, the official guideline is to skip, not to improvise the entire calendar.
For Mounjaro, the Summary of Product Characteristics (SmPC) also establishes a minimum interval of three days between two doses when changing the weekly day. At Wegovy, the change of day must also respect the interval indicated in the product information.
If you have forgotten more than one dose
After several forgettings there may be less tolerance when restarting, especially if you were on a high dose. The Wegovy information notes that a lower starting dose may be considered. Don’t automatically return to the bottom step without consulting.
How to avoid new forgetfulness
A weekly reminder, visible note, check-in, or shared alarm can help. If the chosen day is difficult to maintain, ask if it can be safely changed.
If forgetfulness is frequent, the problem is not necessarily resolved with more alarms: perhaps the regimen, presentation or treatment does not fit well with your life and it is worth reviewing it.
Medically reviewed by Dr Paola Blanco
Medical reviewer for Costa Medical Services. Clinical coherence, safety and source quality reviewed.
✓ Spanish medical registration 292891820 · Review August 30, 2026
Official and clinical sources
Regulatory information may change. Before publishing in WordPress, you should double-check the current version of the SmPC and leaflet.
Do you need a medical evaluation?
The consultation is used to review symptoms, history, medication and decide if online management is appropriate or if you need in-person care.