IM Injections Revive at The Group Med Spa Subcutaneous vs intramuscular what's the difference? #vitamintherapy #theb12store #injection B 12 (Methylcobalamin) Therapy MedClub by Dr Jenn Understanding the 4 main types of injections makes medical knowledge simple and clear. Intramuscular, Subcutaneous, Intradermal & Intravenous each one plays a different role in treatment. Stay informed, stay safe! How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust 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.