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
Some people feel improvement in fatigue sooner, but blood markers and neurologic symptoms may take longer to assess
What are B12 injections used for
Chloramphenicol should be discontinued if anemia attributable to chloramphenicol is noted during periodic blood studies, which should be done approximately every 2 days during chloramphenicol receipt