A controlled (scheduled) drug is one whose use and distribution is tightly controlled Schedule III, IV, or V drugs include those containing smaller amounts of. Refilling CII Prescriptions: The refilling of a Schedule II prescription is prohibited. . Partial dispensing of Schedule CIII-IV prescriptions is permissible provided. Also includes anorectant agents not included in other schedules. Schedule 4 sulfate, chlordiazepoxide, diazepam, carisoprodol, midazolam, alprazolam, and phentermine are in this group. NO REFILLS are permitted on these orders.