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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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Hyperlipidemias are treated by administering the following vitamin in megadoses
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The correct answer is  High doses of niacin are effective in lowering serum triglyceride, low-density lipoprotein, and lipoprotein-a levels and in elevating high-density lipoprotein levels. In high doses, Niacin causes dilatation of blood vessels and flushing, along with skin irritation. Intakes of both nicotinic acid and nicotinamide in excess of 500 mg/d also cause liver damage.Harper 30th edition Pg: 557