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 How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust What Happens If You Inject B12 Wrong: 6 Red Flags 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 body but not all injections are the same.