would that change make a difference, do you think? >> one of the changes we need is much more cautious prescribing. opioid are essential medicines for end-of-life care and they also play an important role after major surgery and the serious accidents. the bulk of the prescribing in the united states is for common chronic conditions were opiatesi may not be safe or effective. we have about 12 millions of americans on opioids chronically, so many americans we are seeing ads on television to treat the side effects of opioid. what we need is much more cautious prescribing, we want doctors to weigh risks versus benefits better when they prescribing opioids. >> tucker: that is a change it wasn't always true that drug companies could advertise directly on television. do you think that companies thay make opioid painkillers ought to be advertising them directly to patients? why not to doctors? >> with opioids the problem has