Summary

Response to warfarin is highly variable, making it difficult to select the optimal dose. Typical doses can range from 0.5 to 20 mg per day, and various factors, such as genetics, can influence an individual's daily dose. The purpose of the European Union Pharmacogenetics of Anticoagulant Therapy Warfarin Study [EU-PACT; Pirmohamed M et al. N Engl J Med 2013] was to compare whether the use of clinical variables and genotype information improves the time in therapeutic range compared with “standard” dosing.