Hello Age 28 years , 55 kgs diagnosed Tuberculosis and advised a four drugs regime ( rifampicin 225 mg+isoniazide 150 mg+ pyrazinamide 750 mg + ethmbutol 400 mg ) . Since your weight is 55 kg , so you should take 2 tablets on empty stomach or 2-3 hours after meal . This is the exact way of treatment for T B . Different doctor prescribe these drugs according to their experience and knowledge for 6-9 months. But according to W H O you should take this course for 2 months . There after rifampicin 450 mg one on empty stomach for 4 month. But one thing I want to tell you NEVER miss a dose of anti T B treatment and take this course till your doctor recommend. Good luck.