title: International Normalized Ratio (INR) increase in patients taking oral anticoagulant therapy (OAT) and using sildenafil (Viagra).
authors.forename: M Angeles
authors.initials: MA
authors.lastname: Fernández
authors.forename: Eva
authors.initials: E
authors.lastname: Romá
mesh_terms: D000074:Acenocoumarol / Q000008:administration & dosage / Q000494:pharmacology*; D000284:Administration, Oral; D000368:Aged; D000925:Anticoagulants / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D001798:Blood Proteins / Q000187:drug effects; D004334:Drug Administration Schedule; D004357:Drug Synergism; D007172:Erectile Dysfunction / Q000188:drug therapy; D005884:Gingival Hemorrhage / Q000139:chemically induced; D006207:Half-Life; D006349:Heart Valve Diseases / Q000097:blood; D006801:Humans; D019934:International Normalized Ratio; D008297:Male; D010879:Piperazines / Q000008:administration & dosage / Q000493:pharmacokinetics / Q000494:pharmacology*; D011183:Postoperative Complications / Q000517:prevention & control; D011485:Protein Binding; D011687:Purines; D011899:Ranitidine / Q000008:administration & dosage / Q000494:pharmacology; D000068677:Sildenafil Citrate; D013450:Sulfones; D013927:Thrombosis / Q000517:prevention & control; D014859:Warfarin / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*
chemical_list: D000925:Anticoagulants; D001798:Blood Proteins; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014859:Warfarin; D011899:Ranitidine; D000068677:Sildenafil Citrate; D000074:Acenocoumarol