Alpidem shows anxiolytic and anticonvulsant properties which appear to be elicited both with a direct mechanism through the interaction with central benzodiazepine receptor (CBR) and with an indirect mechanism by the interaction with peripheral benzodiazepine receptor (PBR) as well as the stimulation of pregnenolone formation. Alpidem was briefly marketed for the treatment of anxiety, but was withdrawn because of liver toxicity.