<prompt> Which antitubercular drug is implicated in the causation of transient memory loss?EthionamideIsoniazidEthambutolPyrazinamide  <response>: The most important side effects of isoniazid include rash 2, fever 1.2, jaundice 0.6 and peripheral neuritis 0.2.Mental abnormalities with INH include euphoria, transient impairment of memory, separation of ideas and reality loss of self-control and florid psychosis.Ethionamide causes mental depression, drowsiness and asthenia. 