I'll analyze this medical question about treating hypercholesterolemia and hypertriglyceridemia with vitamins.
analyse_media
Now I'll invoke the medical-library skill to answer this question properly.
Reading File
Now I'll search the medical library for information about vitamins used to treat dyslipidemia (hypercholesterolemia and hypertriglyceridemia).
Finding Sources
Let me search more broadly for lipid management and vitamins.
Finding Sources
Perfect! I found excellent information. Let me read the detailed content about niacin from Goodman & Gilman's.
Reading File
Based on the medical question and the textbook information I retrieved, here's the answer:
Answer: C) Nicotinic acid
Explanation
The patient presents with hypercholesterolemia, hypertriglyceridemia, elevated LDL, and elevated VLDL - a classic dyslipidemia profile. Among the vitamins listed, nicotinic acid (niacin) is the only one indicated for treating this lipid disorder.
Why Nicotinic Acid Works
According to Goodman & Gilman's Pharmacological Basis of Therapeutics:
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Mechanism: Niacin inhibits lipolysis in adipose tissue by blocking hormone-sensitive lipase, reducing free fatty acid transport to the liver. This decreases hepatic triglyceride and VLDL synthesis, which lowers LDL levels.
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Efficacy:
- Reduces triglycerides by 35-50% at doses of 2-6 g/day
- Reduces LDL-C by ~25% at higher doses (4.5-6 g/day)
- Increases HDL-C by 30-40% (most effective agent for this)
- Only lipid-lowering drug that significantly reduces Lp(a)
Why Other Options Don't Work
- Riboflavin (B2): Cofactor in energy metabolism; no lipid-lowering effect
- Pantothenic acid (B5): Component of CoA; no direct lipid management role
- Pyridoxine (B6): Involved in amino acid metabolism; not used for dyslipidemia
Important Note
The distinction is critical: niacin (nicotinic acid) lowers lipids, while its amide form (nicotinamide) does not have lipid-lowering effects despite both serving as vitamin sources.
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