A 72-year-old man at high risk for cardiovascular disease, with a history of peripheral vascular disease and type 2 diabetes, presented with lipids above targets despite maximum daily treatment with atorvastatin 80 mg, fenofibrate supra 160 mg daily, and ezetimibe 10 mg. His low density lipoprotein cholesterol (LDL-C) was 2.6 mmol/l, total cholesterol: HDL ratio 5.6, and high density lipoprotein cholesterol (HDL-C) 0.9 mmol/l. Because his lipids were not within target, he was advised to start 2250 mg of niacin in three divided doses daily. For 5 months, he mistakenly took 2250 mg of niacin three times daily, a consumption of 6750 mg/day! The effects on his lipids were: HDL-C increased nearly 100% to 1.7 mmol/l, LDL-C decreased by 50% to 1.3 mmol/l, and cholesterol: HDL ratio decreased by over 50% to 2.1. His excessive intake dramatically demonstrates the positive effect of niacin on lipids. Fortunately he did not suffer adverse effects from taking more than the recommended limit of 3000 mg/day.
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Competing interests: None.
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