A class of chemicals used to promote sleep; the main ingredients in most modern sleeping pills and anti-anxiety medication. Side effects include loss of REM sleep and gradual development of tolerance.
Chemical compound commonly used to treat anxiety, to produce sedation, or as a muscle relaxant. Examples are lorazepam (Ativan), diazepam (Valium), oxazepam (Serax), and alprozolam (Xanax).
A class of medications that are used primarily as anti-anxiety, anti-panic, and sleeping agents that are commonly referred to as tranquilizers.