When a drug is administered subcutaneously, where is it injected?

When a drug is administered subcutaneously, it is injected beneath the skin. This route involves placing the medication in the subcutaneous tissue layer, which is located just below the epidermis and dermis. This layer contains connective tissue, blood vessels, and fat, which allows for the absorption of the medication into the bloodstream at a relatively slow and steady rate.

Subcutaneous injections are commonly used for medications that need to be absorbed gradually, such as insulin or certain vaccines. This method is advantageous because it allows for a longer duration of action and is less invasive compared to intravenous or intramuscular injections. Understanding the anatomical location and absorption characteristics of subcutaneous injections is crucial for effective medication administration and patient care.