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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Which of the following is a serious and characteristic adverse effect of Metformin
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The correct answer is  Ans: A. Lactic acidosis [Ref: KDT 7h/e p. 453).Two impoant adverse effects of these agents are lactic acidosis (more with phenformin) and vitamin B12 deficiency (more common with metformin).More common side effects are abdominal pain, anorexia, metallic taste, mild diarrhea and tiredness.