The benzodiazepines and hydroxyzine were removed from a statewide
Medicaid pharmacopeia. Barbiturate sedatives, hypnotic and antipsychotic
medication, and tricyclic antidepressants remained available, but no
substitution was made for about two-thirds of the deleted ataractic
medications. The authors conclide that most physicans regard ataractics as
unique and do not use them interchangeably with the other drugs.