1. This product is mainly used in combination with other anti-tuberculosis drugs for the initial treatment of various tuberculosis cases caused by Mycobacterium tuberculosis, or other sensitive mycobacterial infections. 2. This product can be used alone to treat tularemia, or in combination with other antibacterial drugs for the treatment of plague, inguinal granuloma, brucellosis, rat-bite fever, etc. 3. It can also be combined with penicillin or ampicillin to treat endocarditis caused by viridans streptococci or enterococci.