Final answer:
A patient may be authorized to receive a supply for up to 90 days when issued multiple prescriptions for a Schedule II controlled substance. Practitioners must write multiple prescriptions on the same day with instructions for the pharmacist to fill them sequentially.
Step-by-step explanation:
When issuing multiple prescriptions for a Schedule II controlled substance (CII), a patient may be authorized to receive a supply for up to 90 days. The Controlled Substances Act allows practitioners to write multiple prescriptions on the same day with instructions to the pharmacist for each to be filled sequentially. This practice is meant to allow a patient to have a legitimate supply of the medication while mitigating the risks of diversion or misuse. It is essential for practitioners to follow both federal law and their state's regulations when writing CII prescriptions, as states may have specific requirements or limitations.