Which method of drug administration targets the fat layer beneath the skin?

The method of drug administration that targets the fat layer beneath the skin is subcutaneous administration. This approach involves injecting medication into the tissue layer between the skin and the muscle, effectively reaching the fat deposits located there.

Subcutaneous injections are typically used for medications that require slow, sustained absorption into the bloodstream, such as insulin or certain vaccines. Because the fat layer has less blood supply compared to muscle tissue, this route allows for a gradual release of the drug, making it ideal for long-term therapies or medications that benefit from a slower onset of action.

In contrast, oral administration involves the ingestion of medication, where the drug must pass through the digestive system before absorption, and intravenous administration delivers the drug directly into the bloodstream for rapid effects. Intramuscular administration targets the muscle, where absorption rates can be faster than subcutaneous injections, but it does not specifically target the fat layer as subcutaneous methods do.