How to Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute How to Use These 4 IM Injection Spots Safely INTRAMUSCULAR INJECTION SITES Intramuscular (IM) injections are given directly into the muscle, where the medication is absorbed more quickly than subcutaneous injections. There are several Nwokeiwu Valentine How to Give a B12 Injection: Step By Step Instructions Insulin injections: Selecting the injection site Subcutaneous Injection Sites and Instructions for Safe Self Administration