tylenol kills livercells.eople -- above eight tylenol a day you can get in trouble with the liver. our typical patient coming in on 30, 40 day. >> these are kids. >> children. these are our kids. it's not poor kids. these are all kids. about 50% of high school students know someone who sells drugs in their class. >> tina, yo son did not want his name used. i respect that. he's in tratment, but he had a long road. >> he did. my son was the quintessential kid, you read about them every day. he went to high school. fell in love with marijuana. >> experimenting with drugs? >> experimenting early on. by theime he was a senior he had progressed to oxycontin. he was shooting it. he then went on to heroin. heroin is cheaper. by the time he finishedis first year of college, he was really addicted. the pathetic and scary thing is that my husband and i were totally clueless. we had no idea. in high school, we know kids did beer -- >> not your son, right? >> no. he was nice kid. involved in boy scouts as an eagle scout. s