Treatment of tuberculosis include use of 4 drugs:

• Rifampicin ( R )
  
• Isoniazid ( H )
  
• Ethambutol ( E)
  
• Pyrazinamide ( Z)

In some cases of TB it is use of Streptomycin (S ) is recommended. These drugs are known as 1st line drugs for TB.

To know more details on TB treatment visit:
Treatment of Tuberculosis: guidelines for national programmes
http://whqlibdoc.who.int/hq/2003/WHO_CDS_TB_2003.313_eng.pdf http://www.who.int/tb/publications/tb_2003_313_chap4_rev.pdf