I was taking oxycodone for back pain and my doctor switched me to hydrocodone. When I took the hydrocodone prescription in to be filled the pharmacy called my doctor and told him that I still had some oxycodone left. The doctor had the pharmacy hold my prescription until the 15th. Before I filled hydrocodone I called my doctor and asked if i could just stick with the oxycodone. I got a written prescription for the oxycodone and filled it on the 11th. On the 7th of the next month the pharmacy called me and told me to pick up the hydrocodone prescription. My question is why did they not catch this at the pharmacy and now that it has been close to a month since I picked up the hydrocodone if I try to refill it will they catch the mistake?