PER 5/30/95 AMENDMENT: Patients who have received an acceptable induction regimen prior to study entry and have been found to be susceptible to isoniazid and rifampin with no pyrazinamide resistance are randomized to receive either isoniazid or rifampin plus vitamin B6 biweekly for 18 or 31 weeks. Patients are evaluated at months 1, 2, 4, 6, 8, and 10, and every 4 months thereafter. Minimum follow-up is 1.5 years.