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 Figure. Subcutaneous injection into the deltoid area The Australian Immunisation Handbook Ivy Grove Surgery : Self administration of B12 injection Subcutaneous vs intramuscular what's the difference? #vitamintherapy #theb12store #injection