What type of drug route involves injecting medication directly into the subcutaneous tissue?

The subcutaneous route involves injecting medication directly into the subcutaneous tissue, which is the layer of fat and connective tissue directly beneath the skin. This method is commonly used for the administration of certain medications, such as insulin or heparin, because it allows for slower absorption into the bloodstream compared to intramuscular or intravenous injections.

The subcutaneous tissue provides a suitable environment for gradual release of the medication, making it ideal for drugs that require a sustained effect. Common injection sites for subcutaneous administration include the upper arm, abdomen, and thigh, where the tissue is more accessible.

Using this route can also reduce the risk of injury to nerves and blood vessels that might occur with deeper injections, such as intramuscular or intravenous methods. This controlled absorption can be beneficial for patients who require consistent blood levels of a medication over a longer period.