Isoniazid tablets are effective and useful in killing mycobacteria and are used in the treatment of various types of tuberculosis. Isoniazid is the most bactericidal of the anti-tuberculosis drugs, capable of killing Mycobacterium tuberculosis inside and outside of macrophages, and is used in the treatment of various types of tuberculosis, such as tuberculosis, tuberculous meningitis, and other types of mycobacteria. Isoniazid tablets are used in combination with other anti-tuberculosis drugs for the treatment of tuberculosis infection, which usually requires treatment for more than 6 months. Isoniazid tablets have certain adverse reactions, the more common of which are peripheral neuritis, hepatic impairment, which can be characterized by numbness and pinprick sensation in the limbs, pain in the fingers, and elevation of aminotransferases, which need to be discontinued and treated with medication in a timely manner. Isoniazid tablets are contraindicated in patients with abnormal liver function, psychosis and epilepsy. Isoniazid tablets should be taken under the guidance of a specialist, do not self-medicate.