welcome back. the fda raised a big rad flag today. it is asking doctors to stop prescribing drugs that have more than 325 milligrams per dose of acetaminophen. it s one of the ingredients in powerful prescription painkillers like per koe seperc vicodin. the question we want to know is how much is safe to take and what s the best way to avoid trouble. chief medical correspondence dr. sanjay gupta joins me. sanjay, this fda recommendation, break it down for us. well, this is a message really for prescribers out there, doctors who are prescribing medications that may contain acetaminophen. people know of that as the active ingredient in tylenol. but it s in lots of other medications as well, including prescription medications. what they re saying is you should no longer prescribe, obviously patients shouldn t take but no longer prescribe medications that have more than