Letter: Drug enhancement of warfarin activity.
D000368:Aged; D000493:Allopurinol / Q000494:pharmacology*; D004357:Drug Synergism; D005260:Female; D006801:Humans; D007213:Indomethacin / Q000494:pharmacology*; D011517:Prothrombin Time; D014859:Warfarin / Q000494:pharmacology*
D014859:Warfarin; D000493:Allopurinol; D007213:Indomethacin