What the label says
The Zepbound and Mounjaro prescribing information give the same instruction:[1][2]
If a dose is missed, instruct patients to administer ZEPBOUND 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 administer the next dose on the regularly scheduled day. In each case, patients can then resume their regular once weekly dosing schedule.
And on moving your injection day:
The day of weekly administration can be changed, if necessary, as long as the time between the two doses is at least 3 days (72 hours).
Longer gaps are not coveredThe labels give these rules for a single missed weekly dose. Neither label says how to restart after several missed doses in a row. Ask your prescriber before restarting.
The rule on a calendar
Day 0 is the day the dose was due. Green days: take the missed dose as soon as you remember. Orange days: it is more than 4 days late, so skip it and wait for your normal day.
- 0missed dose day
- 1take it
- 2take it
- 3take it
- 4take it (to 96 h)
- 5skip
- 6skip
- 7next regular dose
The window is counted in hours, so "day 4" means up to the same clock time as the original dose, 96 hours later.
Deadline for each injection day
A missed dose can be taken until the same clock time 4 days after the regular day; for a Monday dose, that is Friday.
| Regular day | Missed dose OK until | Next regular dose |
|---|---|---|
| Monday | Friday, same time | Monday |
| Tuesday | Saturday, same time | Tuesday |
| Wednesday | Sunday, same time | Wednesday |
| Thursday | Monday, same time | Thursday |
| Friday | Tuesday, same time | Friday |
| Saturday | Wednesday, same time | Saturday |
| Sunday | Thursday, same time | Sunday |
Taking a late dose on day 4 and the next regular dose on day 7 leaves exactly 3 days between them, which is the minimum the label allows. That is why the two rules fit together.
Changing your injection day
You can move your weekly day as long as at least 3 days (72 hours) pass between two doses.[1][2] The table shows the earliest new day after your last dose.
| Last dose taken on | Earliest new day |
|---|---|
| Monday | Thursday, same time |
| Tuesday | Friday, same time |
| Wednesday | Saturday, same time |
| Thursday | Sunday, same time |
| Friday | Monday, same time |
| Saturday | Tuesday, same time |
| Sunday | Wednesday, same time |
Moving the day later (for example from Monday to Wednesday of the following week) never breaks the 3-day rule, because it only lengthens one interval.
Common situations
Most missed-dose questions come down to whether more than 4 days have passed.
- Remembered 2 days late. Inside the 4-day window: take it now, then go back to your usual day.
- Remembered 5 days late. Outside the window: skip it and take the next dose on your usual day.
- Travelling across time zones. Count hours, not calendar days. The 96-hour and 72-hour limits are what the label gives.
- Not sure whether you injected. The labels do not cover this. Ask a pharmacist rather than taking a second dose.
Related
- Label dose scheduleThe 4-week steps from 2.5 to 15 mg
- Half-lifeHow much drug is left after a missed week
- Side effectsRates by dose from the label
Frequently asked questions
Can I take Zepbound 5 days late?
The label says no: if more than 4 days (96 hours) have passed, skip the missed dose and take the next one on your regular day.[1]
Can I take tirzepatide 2 days early?
The labels set a minimum of 3 days (72 hours) between doses. Two days after your last dose is too soon.
What if I missed two weeks of tirzepatide?
The labels only describe a single missed dose. After two or more missed weeks, ask your prescriber how to restart.