4. Use, in the past two weeks, of psychoactive medications (four weeks for fluoxetine) or medications that may affect brain function (including but not limited to opioid analgesics, tricyclic antidepressants, selective serotonin reuptake inhibitors [SSRIs], or serotonin norepinephrine reuptake inhibitors [SNRIs], benzodiazepines and barbiturates) as determined by self-report and/or medical history;