There are some differences between Pasiniazid tablets and isoniazid in terms of composition, indications and adverse effects. 1. Composition: Pasiniazid tablets are a chemical synthesis of isoniazid and p-aminosalicylic acid. Pasiniazid tablets are a chemical synthesis of isoniazid and p-aminosalicylic acid, which is more p-aminosalicylic acid than isoniazid alone. 2. Indications: Pasiniazid tablets can be used in combination with other anti-tuberculosis drugs for the treatment of all types of pulmonary tuberculosis, endobronchial tuberculosis and extrapulmonary tuberculosis. Isoniazid is mainly used in the treatment of all types of tuberculosis, including tuberculous meningitis and other mycobacterial infections. 3. Adverse reactions: patients taking Pasiniazid tablets occasionally have fever, rash, nausea, fatigue, dizziness, headache, insomnia, jaundice, peripheral neuritis, hematocrit and other adverse reactions. The adverse effects of isoniazid are relatively more serious, possessing some hepatotoxicity and neurotoxicity. The contraindications for both drugs are similar, and neither is suitable for patients with psychosis and epilepsy, or patients with severe liver dysfunction. Both drugs need to be taken in strict accordance with medical advice, and pay attention to regular review in the course of medication.