Can I Drink Alcohol Before Epidural Steroid Injection? Safety Tips Cyanocobalamin (Vitamin B12) Injection How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust Experiencing any of these symptoms? B12 supplementation might be right for you. Some causes of low B12 are diet, alcohol use, certain diseases like Chrohn's and Celiac Disease, and Gastric Bypass surgery, Can you drink alcohol while taking your medications? Its important to know which medications interact with alcohol. Some medicines can cause serious side effects or make your treatment less effective