Anxiety is an emotional state in which fear dominates a person's life. Drugs that are often prescribed to manage anxiety episodes are known as benzodiazepines. Probably the best-known example of a benzodiazepine is the anxiolytic diazepam. In the United States, diazepam is sold under the brand name Valium.
Other /More definition:
Anxiolytics refer to drugs (such as Valium) that produce relaxation or reduce anxiety; Anxiety-reducing drugs