Pharmacogenetic testing for warfarin dosage helps personalise treatment with warfarin, a commonly prescribed blood thinner used to prevent clot formation in conditions such as atrial fibrillation and after certain surgeries. Warfarin has a narrow therapeutic window, and incorrect dosing can lead to life-threatening bleeding or ineffective clot prevention. This test analyses genetic variations in the CYP2C9 and VKORC1 genes to help determine the ideal warfarin dose, ensuring safer and more effective treatment.