The<unk> s (pronounced [ˌbɛnzoː.daɪˈæzəˌpiːn], often abbreviated to "benzos") are a class of psychoactive drugs with varying hypnotic, sedative, anxiolytic, anticonvulsant, muscle relaxant and amnesic properties, which are mediated by slowing down the central nervous system.<unk> s are useful in treating anxiety, insomnia, agitation, seizures, and muscle spasms, as well as alcohol withdrawal. They can also be used before certain medical procedures such as endoscopies or dental work where tension and anxiety are present, and prior to some unpleasant medical procedures in order to induce sedation and amnesia for the procedure. Another use is to counteract anxiety-related symptoms upon initial use of SSRIs and other antidepressants, or as an adjunctive treatment. Recreational stimulant users often use<unk> s as a means of "coming down" (see: Drug abuse).<unk> s are also used to treat the panic that can be caused by hallucinogen intoxication.
The long-term use of<unk> s can cause physical dependence. The use of<unk> s should therefore commence only after medical consultation and<unk> s should be prescribed the smallest dosage possible to provide an acceptable level of symptom relief. Dependence varies with the<unk>  used and with the user.
Benzodiazepine
Alcohol
Antidepressants
Methamphetamine
Opioid
Anxiolytics
Benzocaine 
Benzidine