Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg 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 Subcutaneous vs intramuscular what's the difference? #vitamintherapy #theb12store #injection Figure. Subcutaneous injection into the deltoid area The Australian Immunisation Handbook How to inject vitamin B12 into your belly