RT Journal A1 Fellner SK, Tuttle EP T1 THe clinical syndrome of analgesic abuse JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1969 FD September 1 VO 124 IS 3 SP 379 OP 382 DO 10.1001/archinte.1969.00300190119021 UL http://dx.doi.org/10.1001/archinte.1969.00300190119021 AB The precise role of phenacetin, its metabolites, associated impurities, and fellow travelers, aspirin and caffeine, in producing interstitial nephritis remains to be clearly defined.1,2 Despite continuing disagreement regarding the pathogenesis of the renal disease, it is clear that abuse of analgesic compounds is associated with a high incidence of chronic interstitial nephritis or pyelonephritis or both and in many instances with papillary necrosis as well.3-6Gsell and co-workers2 have described the clinical picture of analgesic nephropathy, stressing the physiological consequences of insidiously progressive renal failure. Other writers have focused upon the situations in which analgesic abuse is found to occur5,7,8 or upon some of the associated clinical findings of the syndrome. Noteworthy is the common occurrence of migraine headache,5 gastritis and peptic ulcer,5,7,9 anemia,4 and psychiatric disease.4,10 These and other features of the clinical syndrome of analgesic abuse have recently been reviewed