<prompt> Which of the following drugs used in MDR TB may lead to suicidal tendencies:PASPyrazinamideCycloserineNone of the above  <response>: Psychiatric disturbances : The common offending drugs are cycloserine, quinolones andor ethionamide. In cases of suicidal tendencies and other psychiatric disturbances, the first offending drug is cycloserine, followed by ethionamide and quinolones. These drugs will be withheld and fuher management of the patient will be done in consultation with the psychiatrist. Ref: 