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  • Title: Trimethoprim-sulfamethoxazole compared with ciprofloxacin for the prevention of urinary tract infection in renal transplant recipients. A double-blind, randomized controlled trial.
    Author: Hibberd PL, Tolkoff-Rubin NE, Doran M, Delvecchio A, Cosimi AB, Delmonico FL, Auchincloss H, Rubin RH.
    Journal: Online J Curr Clin Trials; 1992 Aug 11; Doc No 15():[4083 words; 46 paragraphs]. PubMed ID: 1343609.
    Abstract:
    BACKGROUND: Prophylaxis with low-dose trimethoprim-sulfamethoxazole has been shown to be cost-effective in the prevention of urinary tract infections, pyelonephritis, urosepsis, and pneumocystis pneumonia in renal transplant recipients. Ciprofloxacin, effective against almost all urinary tract pathogens in this patient population, represents a promising alternative prophylactic agent for patients unable to tolerate trimethoprim-sulfamethoxazole due to toxicity. METHODS: We conducted a randomized, double-blind trial to compare low-dose trimethoprim-sulfamethoxazole with ciprofloxacin for the prevention of urinary tract infections in renal transplant recipients. Patients received either ciprofloxacin (250 mg) or trimethoprim-sulfamethoxazole (80 mg trimethoprim, 400 mg sulfamethoxazole) daily for 6 months following transplantation. Treatment was considered successful if patients completed the 6-month course and 3-month follow-up period without evidence of urinary tract infection or drug-related toxicities. RESULTS: Of 103 eligible patients, 51 received ciprofloxacin and 52 received trimethoprim-sulfamethoxazole. At 6 months, treatment was successful in 75% (38 of 51) receiving ciprofloxacin and 71% (37 of 52) treated with trimethoprim-sulfamethoxazole (P = 0.87, relative risk 1.04, 95% confidence limits 0.83 to 1.33). Thirteen patients (25%) receiving trimethoprim-sulfamethoxazole withdrew from the study-4 for resistant urinary tract infection and 9 for drug-related toxicity, while 3 (6%) of the patients receiving ciprofloxacin withdrew because of drug-related toxicity (P = 0.016, relative risk of urinary tract infection or adverse event 0.24, 95% confidence limits 0.07 to 0.78). At 9 months, all 38 patients who completed the 6-month course of ciprofloxacin remained free of urinary tract infection, while an additional 4 patients who had received trimethoprim-sulfamethoxazole prophylaxis (total of 8 patients over the 9 months) developed urinary tract infections (P = 0.006, Fisher's exact test for urinary tract infection alone). Pneumocystis pneumonia occurred in a total of 7 (14%) patients who were randomized to ciprofloxacin, but 2 of the 7 had withdrawn from the study at least 2 weeks prior to the diagnosis of pneumocystis pneumonia. There were no cases of pneumocystis pneumonia in patients receiving trimethoprim-sulfamethoxazole (P = 0.006). Following completion of the study, monthly aerosolized pentamidine administered in conjunction with ciprofloxacin has provided complete protection against urinary tract infection and pneumocystis pneumonia in 30 transplant recipients unable to tolerate trimethoprim-sulfamethoxazole therapy. CONCLUSIONS: Ciprofloxacin is at least as effective as trimethoprim-sulfamethoxazole in the prevention of urinary tract infection in renal transplant recipients, and is better tolerated. Ciprofloxacin prophylaxis is associated with a higher incidence of pneumocystis pneumonia than is trimethoprim-sulfamethoxazole therapy. An uncontrolled follow-up study suggests that ciprofloxacin prophylaxis combined with monthly aerosolized pentamidine may be efficacious in preventing both urinary tract infection and pneumocystis pneumonia in renal transplant recipients.
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