Additional exclusion criteria were: (a) serious medical conditions or use of prescription medications, (b) current or lifetime history of a DSM-IV axis I disorder, (c) use of psychoactive medications within the past 90 days, (d) treatment in the last 6 months with any medication that may affect GABAergic function, including antidepressants, antipsychotics, sedative hypnotics, glucocorticoids, appetite suppressants, opioids, or dopaminergic medications, (e) positive urine toxicology screen, or (f) positive pregnancy test or lactating.
