Cyanocobalamin Injection, 1000 mcg mL 1mL Vial B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Mecobalamin, a naturally occurring form of vitamin B12, was approved in Japan on September 24 under the brand name Rozebalamin to treat ALS.Vitamin B Injections prove to be helpful for newly diagnosed Does anyone take b12 liquid form? If so how much? Or injection? How to Give a B12 Injection: Step By Step Instructions