Subcutaneous Injection Sites and Instructions for Safe Self Administration Not all shots are the same here's a guide Injections are a fast, effective way to deliver medications, nutrients, and vaccines directly into the bodybut not all injections are the Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief Needle Injection Techniques Every Nurse Should Know! Whether you're prepping for your NCLEX or brushing up on your skills, here's a quick breakdown of the most common injection routes you'll encounter