What is the maximum volume recommended for an intramuscular injection in the deltoid muscle?

The maximum volume recommended for an intramuscular injection in the deltoid muscle is 2 mL. The deltoid muscle, located on the upper arm, has a limited capacity for fluid because of its smaller size and the surrounding structures, which include nerves and blood vessels. Injecting volumes greater than this can increase the risk of complications, such as pain, tissue trauma, and potential nerve damage.

For intramuscular injections in adults, certain sites allow for larger volumes, but the deltoid is specifically limited due to these anatomical considerations. The gluteal muscles, for example, are appropriate for larger volumes because they can accommodate more fluid without the same risk of complications associated with the deltoid. Understanding these limits ensures safe and effective administration of medications through intramuscular routes, safeguarding the patient from harm.