As the However, while risks of severe toxicity are low, some side effects are still possible, such as: temporary symptoms, such as itching, swelling, or diarrhea allergic reaction damage from the injection hypokalemia, or low potassium levels infection negative interactions with certain medications, such as: metformin (Fortamet, Glucophage, Riomet) medications to reduce gastric acid, such as proton pump inhibitors or H2 receptor antagonists Always talk with a doctor before using vitamin B12 supplements
Additionally, if your gastrointestinal tract does not function normally, as with celiac disease or Crohns disease, you may have trouble absorbing or releasing vitamin B12, which will affect the levels in your body and how long the vitamin stays there
Mayo Clinic: Hangovers MDPI Nutrients : The Influence of Alcohol Consumption on Intestinal Nutrient Absorption: A Comprehensive Review BMJ Nutrition, Prevention, and Health : Randomised double-blind placebo-controlled intervention study on the nutritional efficacy of a food for special medical purposes (FSMP) and a dietary supplement in reducing the symptoms of veisalgia Cleveland Clinic: Hangover
This is because they dont need to be digested, which avoids the risk of low absorption
As a result, drinking too much of it results in dehydration
Summary Vitamin B12 injections can be an effective way of treating a deficiency