Practice Nursing You know where you can stick that or do you? Where to inject the deltoid and why Practice Nursing Deltoid Muscle Injection The deltoid muscle is a common site for intramuscular (IM) injections, especially vaccines! What gauge needle do you use for an IM injection? Answer in the comments! #medicationadministration #IMinjection # How to Give a B12 Injection: Step By Step Instructions Vitamin B12 Shots: Uses, Intake Levels, and Safety Figure. Subcutaneous injection into the deltoid area The Australian Immunisation Handbook 12.6 Administering Intramuscular Injections Clinical Nursing Skills OpenStax