- Use of concomitant medications that substantially increase seizure risk. Such drugs could include neuroleptics (ex. haloperidol, droperidol), clozapine, tricyclic antidepressants (ex. amoxapine, clomipramine), bupropion (particularly the immediate release - IR - formulation) donepezil, psychostimulants (ex. methylphenidate), theophylline and/or other drugs that reduce the seizure threshold. For individuals on any of these medicines, a study clinician will evaluate the drugs and doses to determine the risks and benefits. These will then be discussed with the individual's Primary Care Physician to determine if the individual should be excluded from the study.