Mounjaro injection sites, without the guesswork
Tap where your last shot went and get a simple weekly rotation across the three areas the label lists.
Plan your rotation
Where did your last shot go?
First shot? Choose the spot with your clinician and the Instructions for Use — then come back to plan the rotation.
Which day is shot day?
Pick your last spot and your plan appears here.
Your next eight weeks
A different area every week, alternating sides — so every spot rests for six.
Then the loop starts over. Saved on this device, so your plan is here next week.
What the Mounjaro label actually says
Mounjaro (tirzepatide) is a once-weekly shot given subcutaneously — just under the skin. The FDA label lists the abdomen, thigh, or back of the upper arm, and says another person should inject the upper-arm site. MedlinePlus, the NIH's plain-language drug reference, lists the same three areas for tirzepatide.
Why rotating matters
The instructions don't just say where — they say to rotate injection sites with each dose. Cleveland Clinic describes how repeated injections in the same area can cause lipohypertrophy, a lump of fatty tissue under the skin. Its prevention advice matches the label's: change sites each time, and keep injections at least a finger width apart.
Is there an official rotation order?
No. The label asks you to rotate but doesn't prescribe a pattern — which is why people end up guessing. The loop above is one simple, even way to follow the instruction: a different area every week, alternating sides, so each of the six spots rests for weeks between shots. If your clinician has given you a pattern of your own, theirs wins.
Read the full guide: where to inject a GLP-1 →Planners for other medications
Mounjaro injection sites, answered
Where do you inject Mounjaro?
The FDA label lists the abdomen, thigh, or back of the upper arm for a once-weekly subcutaneous (under-the-skin) injection. It says another person should inject the upper-arm site. Which area suits you best is a conversation for your clinician.
Do you have to rotate Mounjaro injection sites?
The label says to rotate injection sites with each dose rather than reuse the same spot. Rotation is generally recommended to protect the skin you inject into.
What is lipohypertrophy?
A lump of fatty tissue that can form under the skin after repeated injections in the same area, as Cleveland Clinic describes it. Changing sites each time helps reduce the risk.
Are Zepbound injection sites the same?
Zepbound and Mounjaro are both tirzepatide, and the same three body areas apply: abdomen, thigh, or the back of the upper arm. Another person should inject the upper-arm site. The planner works the same for either — and Tonic tracks both.
Sources
- Mounjaro (tirzepatide) — FDA Prescribing Information — FDA, label revision 2025
- Tirzepatide Injection — MedlinePlus Drug Information — NIH MedlinePlus
- Lipohypertrophy — Symptoms, Causes, Treatment & Prevention — Cleveland Clinic
On Mounjaro? Tonic logs each shot, remembers your rotation, and suggests the next spot when dose day comes around.
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