What if I forget my injection day?

Take the missed dose as soon as you remember, as long as it is within 5 days of the scheduled day. After 5 days, skip it and take the next dose on your regular day. Never double-dose.

Can I inject in the same spot every week?

No — rotate sites. Same-spot injection over months causes lipohypertrophy (lumpy fat tissue) which can affect absorption. Aim for at least 2 inches between consecutive injection sites.

Most patients describe it as a pinch or minor sting. Cold pens hurt more — warming the pen for 15–30 minutes and letting the alcohol fully dry both reduce discomfort. The needles are very thin (32 gauge).

Inject Mounjaro step by step

How to inject Mounjaro

Mounjaro is a weekly subcutaneous injection. The whole process takes under 5 minutes once you have the rhythm. Below: the FDA-recommended steps from pen prep through disposal.

Time

5 min

per weekly dose

Storage

2–8°C fridge

never freeze

Frequency

Once weekly

same day each week

1
Remove the pen from the fridge 15 minutes early
Cold Mounjaro stings on injection. Let the pen warm to room temperature for 15–30 minutes before use. Do not microwave or run under hot water.

How to inject Mounjaro

Remove the pen from the fridge 15 minutes early

Inspect the medication

Attach a new needle (if your pen requires one)

Dial the correct dose

Choose an injection site

Clean the skin

Pinch the skin and insert at 90°

Hold for 5–10 seconds, then remove

Dispose of the needle safely

Log the injection

Frequently asked

More on using your GLP-1

Mounjaro full overview

Traveling with GLP-1

GLP-1 shortage tracker

Prior auth letter