"Intramuscular" refers to a method of delivering medication directly into a muscle. This technique allows for faster absorption into the bloodstream compared to other methods, such as oral administration. Common sites for intramuscular injections include the deltoid muscle in the upper arm, the vastus lateralis in the thigh, and the gluteus maximus in the buttocks. Intramuscular injections are often used for vaccines, hormones, and certain medications that require quick action. The procedure typically involves using a syringe and a needle, with the needle being inserted at a specific angle to ensure the medication is delivered effectively into the muscle tissue.