THE vascular changes of necrotizing angiitis have been demonstrated angiographically in a number of drug users, and the disorder has been putatively linked to methamphetamine sensitivity.1 , 2 Acute polyarteritis has also been reported, in the absence of drug use, in some patients with hepatitis B or circulating hepatitis B antigen (HB Ag).3 4 5 6 In the following case angiographically and histologically confirmed necrotizing angiitis co-existed in a methamphetamine user with hepatitis B who was restudied angiographically five months later and in whom catastrophic hemorrhage from a renal-artery aneurysm was demonstrated by selective arteriography.Case ReportA 24-year-old methamphetamine and heroin user was admitted . . .