Which actions can a pharmacist NOT take with Schedule C3-C5 prescriptions?

A pharmacist may not change the quantity of a prescription for a Schedule C3-C5 drug because doing so would alter the prescriber's original intentions regarding the medication dosage. This could affect the patient's treatment plan and safety, as the prescribed quantity is usually determined based on specific clinical considerations. Modifying the quantity without consulting the prescriber could lead to potential overuse or underuse of the medication, which poses risks to patient health.

In contrast, adding non-critical information such as the patient's age or the prescriber's address may be permissible, as these do not change the fundamental aspects of the prescription. However, adding the prescriber's signature is not allowed because it is a critical component of the prescription that verifies authenticity and authority. Thus, any adjustments to these elements must be done carefully to maintain the integrity of the prescription and adhere to regulations governing controlled substances.