Adverse effects of antituberculosis drugs causing changes in treatment.

The adverse effects of drugs which caused changes in therapeutic regimens have been studied in 511 patients with pulmonary tuberculosis, at the Pavilion Koch of Buenos Aires University. In 384 patients who had not received any treatment before, the frequency of such modifications was 6.5%, and in 127 retreated patients it was 15.0%. The characteristics of the adverse effects and the measures aimed at reducing them were studied.