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 B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Subcutaneous Injection Sites and Instructions for Safe Self Administration Vastus Lateralis Intramuscular Injection Everything You Need To Know Dr. Nabil Ebraheim How to Give a B12 Injection: Step By Step Instructions