Benzodiazepines are a class of central nervous system depressant drugs that are used to treat anxiety, insomnia, and seizures. They were discovered in 1954 by an Austrian chemist working for Hoffmann-La Roche and introduced in 1960 as Librium. Benzodiazepines work by suppressing the central nervous system and are used to treat anxiety disorders, sleep disorders, mood disorders, and alcohol or substance withdrawal, among other conditions. Withdrawal from benzodiazepines can cause anxiety, insomnia, gastrointestinal issues, seizures, and hyperactivity if stopped abruptly.