Where is the subcutaneous injection administered?

The subcutaneous injection is administered beneath the skin, specifically into the fatty tissue located just below the dermis and epidermis layers. This method of administration allows for slower absorption of the medication into the bloodstream compared to intramuscular or intravenous routes. Medications delivered subcutaneously are ideal for those that require a gradual and sustained release, such as insulin or certain vaccines, making it a common practice in various healthcare settings.

The structure of subcutaneous tissue, with its rich vascular supply, ensures that medications can be absorbed effectively. This technique is performed using a short needle, and the injection site is usually areas with adequate fatty tissue, like the abdomen, thighs, or upper arms.