Abstract
Ten years ago, specific high-affinity binding sites for benzodiazepines (BDZs) were found in the brain (Mohler & Okada, 1977; Squires & Braestrup, 1977). These binding sites are believed to be the primary site of action of BDZs and are found on the same protein as GABA receptors. GABA is the main inhibitory neurotransmitter in the brain.