Where subcutaneous shots go
A subcutaneous shot goes into the fat layer just under the skin. Approved-drug labels for semaglutide and tirzepatide list three areas: the abdomen, the thigh and the upper arm.
| Area | Where exactly | Notes |
|---|---|---|
| Belly (abdomen) | At least 5 cm (2 inches) away from the navel. | Most common. Easy to see and reach. |
| Thigh | Front and outer part, between the knee and the hip. | Easy to reach when sitting. |
| Upper arm | Back of the upper arm, on the fatty part. | Hard to reach alone. A helper may be needed. |
Rotating sites
Do not use the same spot every time. Repeated shots in one place can cause hard lumps under the skin. This is called lipohypertrophy.
Insulin guidance warns that drugs absorb unevenly from lumpy skin. Peptide shots are different drugs, but the same skin rules are the safe habit.
- Pick a different spot each time, at least 1 cm (about a finger width) from the last one.
- Many people move across one area for a week, then change areas.
- Write down where you injected. A phone note is enough.
- Look at and feel your skin often. Avoid any lump you find.
How to give the shot
- Wash your hands. Wipe the vial top with an alcohol swab.
- Clean the skin with a swab. Let it dry fully.
- Pinch up a fold of skin and fat between thumb and finger if your needle is long or you are lean.
- Insert the needle at 90° (straight in). Use 45° if you pinch very little tissue or use a longer needle.
- Push the plunger slowly and fully. Count to about 5 before pulling out.
- Release the pinch. Do not rub hard. Press lightly if there is a drop of blood.
- Put the used syringe straight into a sharps container.
Short insulin needles (4 to 8 mm) are made for 90° or 45° use. Insulin injection guidance says a pinch is often not needed with the shortest needles in adults.
What to avoid
- Bruises, scars, moles, tattoos, stretch marks and broken or sore skin.
- The navel area (inside 5 cm).
- Lumps and hard patches from earlier shots.
- Skin that is red, hot, swollen or itchy.
- Injecting through clothing.
Intramuscular basics
Intramuscular (IM) means into the muscle, below the fat. It needs a longer needle than a subcutaneous shot. Our Cerebrolysin page notes that its label allows IM use.
- Common IM areas are the outer thigh, the upper outer buttock and the shoulder muscle.
- IM shots are normally given by a trained nurse or doctor.
- WHO injection-safety guidance covers the technique and why training matters.
- Do not use a short insulin syringe for an IM shot.
Signs of infection: see a doctor
Mild redness for a few hours can happen. See a doctor soon if you notice any of these:
- Redness that spreads or lasts more than a day or two.
- Warmth, swelling, pus or a painful lump.
- Fever or chills.
- Red streaks moving away from the spot.
Go to an emergency room for trouble breathing, a swollen face or a fast-spreading rash.
Needle disposal in the Philippines
- Use a sharps container. A hard plastic bottle with a screw cap also works, such as a detergent bottle.
- Do not recap, bend or break used needles.
- Never put loose needles in household trash. Waste workers can be stabbed.
- Close the bottle when it is about three-quarters full, and label it “sharps”.
- Ask your local health center, clinic or pharmacy how they take sharps waste.
Sources
- FDA prescribing information for semaglutide (Wegovy, Ozempic) and tirzepatide (Mounjaro, Zepbound), on DailyMed (Ozempic, Mounjaro): injection areas.
- Frid AH et al. New Insulin Delivery Recommendations. Mayo Clin Proc 2016 (Forum for Injection Technique), PMID 27594187.
- FDA: Safely using sharps at home, at work and on travel.
- WHO: WHO best practices for injections and related procedures toolkit.
Educational only. Not medical advice. Ask a nurse or doctor to show you the technique in person.