How to Give a B12 Injection: Step By Step Instructions How Long Does a B12 Shot Last? Duration, Benefits & Timing 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 Can I Drink Alcohol Before Epidural Steroid Injection? Safety Tips How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust Vitamin B12 Injections Feeling tired, low on energy, or just not like yourself? Vitamin B12 might be the boost your body needs Vitamin B12 plays a vital role in: