Common Mistakes in B12 Injections to Avoid Is B12 Injection Painful 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 to draw up B12 (labeled as Methylcobalamin) Injections Transformations Weight Loss B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics