Compounded Vitamin B Complex Injection Empower Pharmacy Boost Energy and Wellness with Rx B12 Injections 10 mg High Dose Vitamin B12 LifespanningRx Vitamin B12 Deficiency: Nerves & Big RBCs! "Sir, haath pair mein jhanjhanahat (tingling) kyu hoti hai?" If your patient is a strict vegetarian complaining of nerve pain and fatigue, Vitamin B12 injections deliver high doses of this essential vitamin directly into your bloodstream for better absorption than oral supplements to boost energy, support red blood cell production and maintain nerve function.