[Allopurinol toxicity. Apropos of 1 case].

Allopurinol is widely used in the treatment of hyperuricemia. Unusual (78 cases published up to 1984) but severe toxicity includes renal, skin and hepatic involvement. We report a new case of serious toxic manifestations with acute interstitial nephritis. We stress the need to adapt the daily dosage of the drug to the glomerular filtration rate and to interrupt drug administration rapidly if allergic manifestations develop.