Prescription narcotic, Percocet

Let’s say John calls into the office
and is requesting a refill for his prescription narcotic,
Percocet. He just received a 30-day supply of
Percocet less than two weeks ago. He becomes irate
that it cannot be filled. How should you handle John’s
phone call? Should you make the doctor aware he is
already out of his Percocet? What schedule drug
does Percocet fall into? What are the potential
dangers with John’s situation?