Independent. Not affiliated with Eli Lilly or Novo Nordisk.Not medical advice. Your prescriber decides your treatment.
GLP-1 Field GuidePractical help, sourced from the label

Missed a dose of Mounjaro? What to do

Mounjaro gives you 4 days to take a late dose. After that, you skip it and go back to your usual day. Here is the rule from the prescribing information, with examples.

Compiled by the GLP-1 Field Guide editorUpdated 3 min readSourced from official labels. Not yet clinically reviewed.
Key points
  • Within 4 days (96 hours): take the missed dose as soon as possible.
  • More than 4 days: skip it, then take the next dose on your regular day.
  • Never double up.
  • Missed more than one dose? Check with your prescriber first.
  • Changing your day? Keep at least 3 days between doses.
Before you read onThis is the general rule printed on the label. If you feel unwell or are unsure which dose to take, check with your prescriber or pharmacist before injecting.

The 4-day rule

Take the missed dose as soon as possible within 4 days (96 hours) after the missed dose. If more than 4 days have passed, skip the missed dose and take the next dose on your regularly scheduled day.[1]

Within 4 days: take it
After 4 days: skip it
MonTueWedThuFriSatSunMon
Missed dose (your usual day)Next dose, as usual
The 4-day rule from the Mounjaro prescribing information, for a usual dose day of Monday.

Examples

Your day is Monday. You remember on...What the label says
Tuesday or WednesdayTake it now. Next dose Monday as usual.
ThursdayTake it now. Next dose Monday as usual.
FridayOnly if it is still within 96 hours of your usual time. Otherwise skip it.
Saturday or SundaySkip it. Next dose Monday as usual.

Applying the rule in the Mounjaro prescribing information.[1]

Missed more than one dose

The label's rule is for a single missed dose. If you have missed two or more, contact your prescriber before your next injection rather than restarting on your own.

Changing your injection day

You can move your weekly day as long as there are at least 3 days (72 hours) between two doses.[1] Mounjaro can be taken at any time of day, with or without meals.[1]

The free logbook can add a weekly reminder to your phone calendar in one tap.

Common questions

What happens if I miss a dose of Mounjaro?

The prescribing information says to take the missed dose as soon as possible within 4 days (96 hours) after the missed dose. If more than 4 days have passed, skip it and take the next dose on your regularly scheduled day.

Can I take Mounjaro a day or two late?

Yes. One or two days late is inside the 4-day window, so take it as soon as you remember and keep your usual day for the next dose.

What if I missed a week of tirzepatide?

If more than 4 days have passed since the missed dose, skip it and take the next dose on your usual day. Do not take two doses to catch up. If you have missed more than one dose, check with your prescriber first.

Can I change my Mounjaro injection day?

Yes, as long as there are at least 3 days (72 hours) between two doses, according to the prescribing information.

What time of day should I take Mounjaro?

Any time of day, with or without meals. Keeping the same day each week is what matters.

Not medical adviceThis guide explains what the official instructions say. Your prescriber and pharmacist know your situation, so ask them if anything here does not match what you were told.

Sources

  1. Eli Lilly and Company. Mounjaro (tirzepatide) Prescribing Information. Revised 08/2026. Last checked 2026-10-01.
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