Vitamin B12 Injection We Come to You ASAP IVs IV Hydration Experts of San Diego, Phoenix, Scottsdale, San Francisco Vitamin B12 shots can be administered to treat B12 deficiencies causing symptoms including chronic fatigue, commonly seen in megaloblastic anemia. Vitamin B12 is also important to prevent damage to nerves. B12 : Boost Your Energy with ! Feeling constantly tired, low on energy, or struggling with focus? It could be due to a Vitamin B12 deficiency! We're How to Give a B12 Injection: Step By Step Instructions