Benzodiazepines are a type of medication known as tranquilizers. Familiar names include Valium and Xanax. Melissa Conrad Stoppler, MD, Chief Medical Editor Benzodiazepines act on the central nervous system, produce sedation and muscle relaxation, and They are usually classified by how long their effects last. Jump to What else should I know about clonazepam? - From WebMD Logo Learn about dementia disorders such as Lewy Body Dementia, Alzheimer's disease (AD), Vascular (multi-infarct). Discover some of the symptoms and. Seizures Symptoms and Types Diazepam (Differences between Side Effects and. Apr 23, - Learn more from WebMD about the effects, symptoms, and abuse of these drugs Familiar names include Valium and Xanax. Benzodiazepines act on the central nervous system, produce sedation and muscle relaxation, and lower anxiety levels They are usually classified by how long their effects last.