title: Ask the doctors. There is a long list of drugs and substances that interact with Coumadin (warfarin). Does this mean they make Coumadin more effective, or less effective?
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Lee
authors.forename: Richard T
authors.initials: RT
authors.lastname: Lee
mesh_terms: D000925:Anticoagulants / Q000008:administration & dosage / Q000009:adverse effects*; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D016903:Drug Monitoring / Q000379:methods*; D006801:Humans; D014859:Warfarin / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D000925:Anticoagulants; D014859:Warfarin