Injection technique: sites, rotation and a pain-free routine

Where to inject #

Three areas, all with good fatty tissue:

• Stomach, at least 5 cm from the navel. The most popular site and usually the least sensitive.
• Front of the thighs, the middle third.
• Back of the upper arm, works, but usually needs a second person.

Why rotation matters #

Injecting the same spot repeatedly causes lumps (lipohypertrophy) which slow absorption and irritate skin. Rotate weekly. A simple pattern such as stomach left, stomach right, thigh left, thigh right covers a month without thinking. Note the day's site in your phone if a reminder helps.

The technique #

• Let the pen warm out of the fridge for 15 to 30 minutes, cold medicine stings more.
• Wash your hands. Wipe the site with soap and water or an alcohol wipe and let the skin dry.
• Use a new needle for each injection. Mounjaro KwikPen needs priming before every injection; preparation differs between devices. Follow the instructions supplied with your pen. See Lilly’s KwikPen guidance.
• Pinch is optional. A relaxed muscle hurts less than a tense one.
• Press and hold, count slowly to 5 (Mounjaro) or 6 (Wegovy), then lift straight out.

Bruising occasionally happens and is harmless. A drop of blood is fine.

If you are needle-worried #

The needles are 4 to 6 mm and finer than a sewing thread. Most people report the anticipation is far worse than the sensation. Techniques which help: inject after a warm shower, distract yourself with a video, and give yourself three doses before judging. If needles remain a hard no, the tablet options exist precisely for you.

Sharps disposal #

Put used needles straight into your sharps bin. Never leave them loose in household waste and never recap them by hand. When the bin is three-quarters full, seal the bin and follow your local council's sharps collection scheme. Most pharmacies also accept sealed bins. Never put sharps bins in recycling.