Sedative drugs are medications that help calm and relax a person, reducing anxiety or restlessness. They work by depressing the central nervous system (CNS), which can lead to drowsiness, reduced excitement, or calming effects. Sedatives are often used to treat anxiety disorders, sleep problems, or to relieve symptoms of other conditions such as seizures or migraines. Examples of sedative drugs include benzodiazepines (e.g., Valium), non-benzodiazepine hypnotics (e.g., Ambien), and barbiturates (e.g., phenobarbital).