Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief How to give yourself an injection? A guide to subcutaneous and intramuscular injections. Medbasic Subcutaneous Injection Sites: Thigh, Abdomen, and Arm Ultrassist How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust How to Remember Subcutaneous Dermal and Intramuscular Vaccines Medical Assistant TikTok Safe IM Injection Site Intramuscular injection should always be given in the **upper outer quadrant of the gluteal region** to prevent sciatic nerve injury. Key nursing points: Upper outer quadrant =