Key Drug Interactions with Ezetimibe
Ezetimibe, used to lower cholesterol by blocking intestinal absorption, has few severe interactions but requires caution with specific classes due to altered efficacy or side effects. It is primarily additive with statins but can interact via bile acid pathways or transporters.
Statins: Enhanced Risk When Combined
Ezetimibe is often prescribed with statins (e.g., simvastatin, atorvastatin, rosuvastatin) for better LDL reduction. Myopathy and rhabdomyolysis risks rise, especially with simvastatin doses over 20 mg daily—FDA limits the combo to 10 mg simvastatin. Monitor CK levels and symptoms like muscle pain.[1][2]
Bile Acid Sequestrants: Timing Matters to Avoid Reduced Absorption
Avoid taking ezetimibe at the same time as bile acid sequestrants (e.g., cholestyramine, colesevelam). These bind ezetimibe in the gut, cutting its absorption by up to 50%. Separate by at least 2 hours (ezetimibe before sequestrant) or 4 hours (after).[1][3]
Fibrates: Potential Myopathy Concerns
Combining with fibrates (e.g., fenofibrate, gemfibrozil) increases muscle-related side effects, though less than statin-fibrate combos. Gemfibrozil poses higher risk; use fenofibrate if needed and monitor closely.[2][4]
Cyclosporine: Dose Adjustments Required
Cyclosporine (immunosuppressant) raises ezetimibe levels 2- to 10-fold via transporter inhibition. Limit ezetimibe to 10 mg every other day and monitor cyclosporine levels.[1][3]
Other Notable Interactions