(((Bebop))) There was a short period of time that my pain med quit working as well, and in fact I needed at least TWICE as much for several months. (You can imagine the angst and hassle with the MD this caused, and projected outcome.) I happened to hear about a MAJOR FDA crackdown locally (it was never on regular news) in that the drug manufacturer and/or the warehouser were cutting the active medication dose within the pills they were selling to the pharmacies. My MD hadn't heard of the problem even by the time I changed pharmacies...and immediately only needed the previous lower dose to cover the same amount of pain. (Walgreens was involved. I moved to a locally owned pharmacy.)

Just a thought.