Intramuscular injections are given where?

• A. In the muscle, upper arm or thigh
• B. Under the skin
• C. Into a vein
• D. In the rectum

Answer: (A)

Intramuscular injections deliver medicine into muscle tissue, not under the skin or into a vein. The upper arm (deltoid) and the thigh (vastus lateralis) are common muscle sites because they provide good muscle mass for absorption. Subcutaneous injections go just under the skin, intravenous injections go into a vein, and rectal administration is not an intramuscular route. So the description of injecting into the muscle of the upper arm or thigh is the correct one.