Which type of injections are administered into the muscle tissue using 1 to 1/2 inch needles?

Intramuscular injections involve the delivery of medication directly into the muscle tissue. This method is used for various reasons, such as the quick absorption of medication into the bloodstream due to the higher blood supply in muscle areas compared to subcutaneous tissue. Needles that are 1 to 1/2 inches long are typically used for these injections because they are long enough to penetrate the skin and subcutaneous layers to reach the muscle, ensuring that the medication is effectively administered where it can be absorbed rapidly.

In contrast, intravenous injections are delivered directly into the bloodstream through a vein, which requires different techniques and needle types. Transdermal refers to medication that is delivered through the skin using patches and does not involve injections. Subcutaneous injections are given into the fat layer just beneath the skin, usually using shorter needles since they do not need to reach the muscle. Therefore, intramuscular injections are specifically characterized by their method of administration, the types of needles used, and the purpose they serve in therapeutic applications.