How to Give a B12 Injection: Step By Step Instructions Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief A Retired RN About Vitamin B12 Injections IM Injection in Elderly Patients Important Tip In elderly patients, muscle mass is often reduced, so technique matters. Always bunch pack the muscle together before inserting the needle This helps 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