about 21,000 involve prescription drugs. and of those, 75% were painkillers. zohydro is pure hydrocodone, five times more than the strongest vicodin. not only that, it can be easily crushed and snorted. but let's not forget chronic pain is a huge issue, tens of millions suffer from it. patient advocates say there is a place for a drug like this. dr. perrone disagrees. >> as a physician, as a drug safety person, this is not the choice that's going to help our population. >> reporter: perrone sat on an advisory panel that voted against zohydro 7-2. against that recommendation, the the fda did agree to put it on the market.