B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Vitamin B 12 intramuscular injections are also used therapeutically to help restore energy and combat various symptoms related to such deficiencies. Vitamin B 12 is essential to the development of healthy blood cells, nerve How Vitamin B12 Injections Affect Your Body: Good or Bad? Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg