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Free Content Split-drug regimens for the treatment of patients with sputum smear-positive pulmonary tuberculosis – a unique approach

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Summary Objective 

To evaluate the efficacy of split-drug regimens for treatment of patients with sputum smear-positive pulmonary tuberculosis in south India. Design 

Randomized controlled clinical trial where eligible patients were randomly allocated to: (i) 2RE3HZ3(alt)/4RH2 (split I): rifampicin plus ethambutol given on one day and isoniazid plus pyrazinamide the next day for first 2 months followed by rifampicin plus isoniazid twice weekly for 4 months, or (ii) 3RE3HZ3(alt)/3RH2 (split II): similar to regimen 1, except duration was 3 months in each phase, or (iii) 2REHZ3/4RH2 (control): rifampicin, isoniazid, ethambutol and pyrazinamide, given thrice weekly for 2 months followed by isoniazid and rifampicin twice weekly for 4 months. All patients were followed up clinically and bacteriologically every month up to 2 years and every 6 months for up to 5 years. Results 

A favourable response (cultures negative for Mycobacterium tuberculosis during the last 2 months of treatment) was observed in 91% of 407 patients in split I, 94% of 415 in split II and 89% of 418 in the control regimen. Ninety-one per cent of 370 patients in split I, 93% of 389 in split II and 90% of 370 in control regimens had quiescent disease at the end of 60 months. Gastrointestinal symptoms were more frequent under the control regimen (P = 0.01). Conclusion 

Split-drug regimens were as effective as the control regimen in terms of favourable response at the end of treatment and quiescent disease at 5 years, and caused fewer gastrointestinal side-effects.
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Keywords: controlled clinical trial; pulmonary tuberculosis; split drug regimens

Document Type: Research Article

Publication date: 2004-05-01

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