Paper I
2023 July (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Ezetimibe

Q33 marksShort Notes

Answer

Ezetimibe is a lipid-lowering drug acting by a mechanism distinct from statins.

MOA: ezetimibeselectively inhibits the NPC1L1 sterol transporter at the intestinal brush border↓absorption of dietary and biliary cholesterol → ↓delivery of cholesterol to the liver → upregulation of hepatic LDL receptors → ↓plasma LDL.

Uses: hypercholesterolemia, as monotherapy in statin-intolerant patients, or combined with a statin for additional LDL lowering when statin monotherapy is insufficient.

Adverse effects: generally well tolerated; mild GI disturbance, headache; myopathy/hepatotoxicity risk increases when combined with a statin (additive, not eliminated by using ezetimibe alone).

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