异烟肼治疗活动性结核病特别有效,它有杀菌作用,其杀菌机理是通过抑制结核菌的合成脱氧核糖核酸。有活动性结核时,异烟肼不能单独使用,应与其他抗痨药物合用以防止在大量结核菌内出现耐药菌株。但仅有结核菌感染(以结素试验阳性表示)而无活动性结核 Isoniazid is particularly effective in the treatment of active tuberculosis, which has a bactericidal effect and its bactericidal mechanism is through the inhibition of mycobacterial synthesis of DNA. With active tuberculosis, isoniazid can not be used alone, should be combined with other anti-tuberculosis drugs to prevent the emergence of drug-resistant strains in a large number of TB. However, only TB infection (indicated by a positive tuberculin test) showed no active TB