Here is a link regarding the change in FDA rules regarding the amount of Tylenol that can be put in prescription drugs. Limit will be 325 starting in January of 2012.
FDA limits prescription acetaminophen - Health - The Buffalo News
What is interesting is the following -
Acetaminophen overdose causes most cases of acute liver failure in the United States, and acetaminophen- containing prescription drugs account for nearly half of them. It happens especially when people try to get additional pain relief by taking more of the prescription drug.
What is interesting is that people just taking Tylenol account for half of this problem.
Smart move by the FDA, and long overdue.