This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which antitubercular drug is implicated in the causation of transient memory loss? \nSelect and explain. \nA. Ethionamide, B. Isoniazid, C. Ethambutol, D. Pyrazinamide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The most important side effects of isoniazid include rash (2%), fever (1.2%), jaundice (0.6%) and peripheral neuritis (0.2%).\nMental abnormalities with INH include euphoria, transient impairment of memory, separation of ideas and reality loss of self-control and florid psychosis.\nEthionamide causes mental depression, drowsiness and asthenia.', 'role': 'assistant'}]