Final answer:
No, not only Schedule II substances can be written on official prescription forms, but also Schedules III, IV, and V drugs under certain conditions.
Step-by-step explanation:
The question is asking whether only Schedule II controlled substances (referred to as C2s) can be written on official prescription forms. The answer to this question is No. While it is true that Schedule II prescriptions require a written prescription and must follow specific guidelines set by the DEA, it is also possible for practitioners to write prescriptions for controlled substances in Schedules III, IV, and V on an official prescription form. Prescribers should follow the legal requirements, which include specifics about the drug's quantity, dosage, and instructions for use. However, for Schedule III to V drugs, telephone and electronic prescriptions are also permissible under certain conditions.