warfarin + rosuvastatin

Warfarin + rosuvastatin is a combination of two pharmaceutical agents used together primarily in patients who require both anticoagulation and cholesterol-lowering therapy. Warfarin is an oral anticoagulant that acts as a vitamin K antagonist, inhibiting the synthesis of vitamin K-dependent clotting factors (II, VII, IX, X) to prevent blood clots. Rosuvastatin is a statin that inhibits HMG-CoA reductase, the rate-limiting enzyme in cholesterol biosynthesis in the liver; this leads to reduced levels of LDL cholesterol and other lipids. When used together, rosuvastatin can enhance the anticoagulant effect of warfarin by increasing its plasma concentration or pharmacodynamic effect—likely through mechanisms not fully understood—which may result in increased bleeding risk due to elevated INR (International Normalized Ratio). Patients on this combination require close monitoring of INR and possible dose adjustments[1][2][3][5].