Mounjaro is a subcutaneous injection, meaning it goes into the fatty layer just under the skin rather than into muscle. Getting the site and technique right keeps injections comfortable and helps the medicine absorb consistently.
Where to inject
The approved injection sites are the **abdomen (tummy)** and the **thigh**. The **back of the upper arm** can also be used, but usually only if someone else is giving you the injection, as it's hard to reach yourself.
- Abdomen — stay roughly 5cm (2 inches) away from your belly button.
- Front or outer thigh.
- Back of the upper arm (if another person injects for you).
Rotate your sites
The manufacturer advises rotating injection sites with each dose. Using the same spot repeatedly can make the skin lumpy or sore over time, which can also affect how well the medicine absorbs. Pick a different spot each week — you can stay within the same general area but move the exact point.
Timing and food
Mounjaro can be injected at any time of day, with or without meals. Most people pick a fixed day each week to make it easy to remember. Some find a little soreness, redness or bruising at the injection site — these injection-site reactions are a recognised, usually mild side effect; you can read more in our guide to how long Mounjaro side effects last.