Diazepam is a medication belonging to the benzodiazepine class, commonly used to treat anxiety, muscle spasms, seizures, and alcohol withdrawal symptoms. It works by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain, which leads to calming effects.

However, it's important to note that diazepam can be habit-forming if used for long periods or in high doses, and sudden cessation after prolonged use can lead to withdrawal symptoms. It should be used cautiously and only as prescribed by a healthcare professional. Additionally, it can cause drowsiness, dizziness, and impair cognitive and motor function, so it's essential to avoid activities requiring mental alertness, such as driving, while taking diazepam.