What is the preferred subcutaneous injection site for many medications in adults, including insulin?

• A. Abdomen
• B. Thigh
• C. Upper arm
• D. Buttocks

Answer: (A)

Absorption consistency is the main idea here. The abdomen is preferred for many subcutaneous injections because it has a broad, relatively uniform layer of subcutaneous fat with good blood supply, which leads to more predictable and often faster absorption. This makes medications like insulin easier to dose accurately and with less variability. Other sites such as the thigh, upper arm, or buttocks can absorb differently due to variations in fat thickness, muscle activity, and blood flow, which can make the onset and duration less predictable. When using the abdomen, rotate sites to prevent tissue changes from repeated injections, avoid the area around the navel, and use proper technique to keep the medication in subcutaneous tissue.