What is one condition for partially filling a C-II prescription?

One important condition for partially filling a C-II prescription is that it must not exceed the total prescribed quantity. When a pharmacist partially fills a prescription for a controlled substance, they are allowed to dispense only a portion of the total quantity prescribed, but they cannot give more than what the prescriber has authorized. This ensures that the patient receives the medication as intended and minimizes the risk of misuse or diversion of controlled substances.

In this context, the other options do not appropriately capture the key requirement for partial filling. While fillings may need to occur at the same pharmacy to ensure continuity and secure record-keeping, that alone does not govern the medication's quantity limits. Similarly, the requirement for payment or concerns about timing (like the 30-day guideline) do not directly address why the prescribed quantity must be respected in a partial fill scenario. Therefore, focusing on the quantity aligns best with regulatory standards governing C-II prescriptions.