1. Any agent that brings about a state of relief from anxiety, or peace of mind.

2. Any agent that produces a calming or sedative effect without inducing sleep.

3. Any drug, such as chlorpromazine, used primarily for its calming and antipsychotic effects, or such as meprobamate, used for symptomatic treatment of common psychoneuroses and as an adjunct in somatic disorders complicated by anxiety and tension.