The DEA federally ordered Purdue to create a tamper resistant medication, due to abuse. It is made so that if you chew it, crush it, attempt to dissolve the pill in liquid (of any type) or do anything instead of swallowing the pill orally; the medication still retains properties of controlled release.
It has taken Purdue years to create this medication to pass DEA federal policy, in fact it consumes about three days for the new OP to be made. OP has a substance inside of the pill that chemically bond around the crystals that made up the OC version. One bond was not enough for federal inspection, more than one bond encapsulates (if you will) even the finest of particles which cannot be broke according to information we have obtained from federal release.
Purdue was also ordered to discontinue the largest of dose, frankly due to affordability for those with chronic pain. A 15% increase occurred from the OC to the OP switch. I have figured out how to extract oxycodone with my first experiment. I am nodding as we speak--- figuring this out is SO simple because Purdues PDF website tells you EXACTLY how to extract oxycodone from the new formulation. I dont know how so many brains can get together and accomplish nothing on SO many different boards, but if you want to know how to extract OC from OP check my thread here