1.Isoniazid (INH): It has an extremely strong killing effect on tuberculosis bacilli, and its low price makes it an essential drug for the treatment of tuberculosis. 2.Streptomycin (SM): It is one of the drugs in the chemotherapy program for the intensive treatment of primary tuberculosis (beginning two months) and has a significant bactericidal effect on Mycobacterium tuberculosis. The drug has damage to the cranial nerve, can cause vertigo tinnitus, hearing loss or even deafness, numbness of the lips and other side effects, so pregnant women, children and the elderly should be prohibited or used with caution. 3.Rifampicin (RFP): It has a strong killing effect on tuberculosis bacteria, and is the most effective anti-tuberculosis drug after isoniazid, and is also an indispensable component of the primary treatment program for tuberculosis. 4.Ethylenebutanol (EMB): It has an inhibitory effect on TB bacilli, especially on TB bacilli that have been resistant to isoniazid and streptomycin, and should pay attention to the change of vision during the medication. 5. Pyrazinamide (PZA): It has a special killing effect on intracellular or resting state of Mycobacterium tuberculosis. The above five drugs are the most commonly used or effective drugs for the treatment of tuberculosis at present. Doctors can make up a reasonable chemotherapy regimen for the treatment according to the changes in the patient’s condition and the use of drugs.