Injections deliver liquid medications, fluids, or nutrients directly into a person’s body. Different types of injections include intravenous, intramuscular, subcutaneous, intraosseous, and intradermal ...

Subcutaneous injections are a method of administering medication just under the skin, between the fatty tissue and muscle. It allows medication to be absorbed slowly over a longer period of time.

An intramuscular injection delivers medication into a muscle. Doctors frequently use intramuscular injections to administer vaccines and certain other drugs. Injection sites include the upper arm, hip ...