What piece of information is NOT required when reviewing a prescription for a C-II substance?

When reviewing a prescription for a C-II substance, the DAW (Dispense As Written) information is not a required piece of information. While the DAW instruction is useful for understanding whether the prescriber has mandated that a specific brand be dispensed rather than a generic, it is not essential for validating the legality or appropriateness of the prescription itself.

In contrast, the other components—patient’s date of birth, the drug’s formulary status, and the physician’s signature—are vital. The patient's date of birth helps to confirm their identity and age, which can influence dosing and appropriateness of the medication. The drug’s formulary status is important for ensuring that the medication is covered under the patient’s insurance plan and can impact the patient’s access to the medication. Lastly, the physician’s signature is a critical element that signifies the prescription's validity and prescriber authority, particularly for controlled substances like C-II drugs, ensuring they were prescribed by a licensed healthcare professional.