Document 2848 DOCN M94A2848 TI Safety of zalcitabine (ddC) in zidovudine (ZDV) intolerant individuals: results of the European Expanded Access Study. DT 9412 AU Moyle G; Goll A; Snape S; F. Hoffmann-La Roche Ltd, Basel, Switzerland. SO Int Conf AIDS. 1994 Aug 7-12;10(1):210 (abstract no. PB0268). Unique Identifier : AIDSLINE ICA10/94369727 AB OBJECTIVE: To assess the tolerability of ddC in HIV positive individuals intolerant to or had clinically failed on ZDV. METHODOLOGY: Patients intolerant to or had failed on ZDV were provided with ddC (0.75 mg tid, weight adjusted) via an open label access program. Recruitment ran from March 1992 to end July 1993. Demographic data were collected at baseline and patients were followed at 4 weekly intervals for drug related events, clinical events and changes in surrogate markers (CD4 cell count, weight, Karnofsky score). The relationship between baseline characteristics and and peripheral neuropathy was specifically examined. RESULTS: At closure of the program 517 patients had been enrolled with at least one follow-up available on 423 patients 70% of the patients were considered ZDV failures. 59% of patients had AIDS at baseline. The mean baseline CD4 count was 52 cells/mm3 with 70% of the patients having CD4 counts below 50 cells/mm3. Only 13% of patients terminated due to drug related adverse events. Table 1 shows the incidence of adverse events occurring during the study assessed as both related and unrelated to ddC. Peripheral neuropathy was the most common drug related event. Analysis of baseline characteristics suggest this toxicity occurred more frequently in patients with a baseline AIDS diagnosis (p = 0.002) (Table 2). Data regarding changes in surrogate and clinical markers will also be presented. TABULAR DATA, SEE ABSTRACT VOLUME. CONCLUSIONS: ddC appears well tolerated in this patient population with unfavorable baseline characteristics. Peripheral neuropathy is the most common drug related toxicity occurring in 14.1% of the patients, and is more common in patients commencing ddC with a baseline AIDS diagnosis. Gastrointestinal disturbance including pancreatitis appears rare with ddC. Hematologic disturbance also appears infrequent. DE Bone Marrow Diseases/CHEMICALLY INDUCED Gastrointestinal Diseases/CHEMICALLY INDUCED Human HIV Infections/*DRUG THERAPY Pancreatitis/CHEMICALLY INDUCED Patient Acceptance of Health Care Peripheral Nervous System Diseases/CHEMICALLY INDUCED Safety Treatment Failure Zalcitabine/ADVERSE EFFECTS/*THERAPEUTIC USE Zidovudine/*ADVERSE EFFECTS CLINICAL TRIAL MEETING ABSTRACT MULTICENTER STUDY SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).