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 Inject Vitamin B12 medicalweightlosscentersofamerica.com like, swipe, and save for when it's your turn to do an injection on a patient Intramuscular (IM) Angle: 90 Needle Size: 2225G, 11.5 inch Med Examples: Vaccines (e.g. Tdap, Subcutaneous Injection: What It Is and How to Give One What Are Subcutaneous Injections? IV Me Now FL VITAMIN B12 cyanocobalamin injection