An antianxiety agent is a medication that is used to reduce anxiety, nervousness and tension in individuals. There are a number of synonyms that can be used to describe this type of medication, including anxiolytic, tranquilizer, sedative, calmative, relaxant, and mood stabilizer. An anxiolytic medication is one that is used specifically to treat anxiety, while a tranquilizer is a medication that reduces anxiety and tension and promotes relaxation. Sedatives and relaxants are medications that are used to promote relaxation and reduce anxiety, while a calmative is a medication that has a calming effect on the body and mind. Mood stabilizers are a type of medication that is used to stabilize mood and reduce anxiety and nervousness.