Letter:  Allopurinol and iron.
D000493:Allopurinol / Q000009:adverse effects / Q000494:pharmacology*; D000818:Animals; D004347:Drug Interactions; D006801:Humans; D007501:Iron / Q000378:metabolism*; D014969:Xanthine Oxidase / Q000037:antagonists & inhibitors
D000493:Allopurinol; D007501:Iron; D014969:Xanthine Oxidase