What muscles are good for injections?

Intramuscular injections (intra = withing + muscul = muscle + ar = pertaining to ++ in = within + ject = throw + ion = noun form) are generally limited to 4 sites.

1. Deltoid Muscle - upper arm just below the shoulder.

2. Vastus Lateralis Muscle - thigh

3. Ventrogluteal Muscle - hip

4. Dorsogluteal Muscle - buttock