Anybody know how Rush Limbaugh avoided acetaminophen OD when he was gobbling Oxycontin like M&Ms?

Rush got hooked quite innocently after being prescribed the narcotic painkiller Oxycontin and other analogs for pain after medical treatment. But once he found out it felt swell to be high on the stuff and it was hard to quit, the man who preaches personal responsibility and pulling yourself up by the bootstraps for everyone else went doctor shopping to get an ever increasing supply of the opiate every day.

All the commercial variants of Oxycontin and Oxycodone have acetaminophen (AKA Tylenol) in them—not because it is a great analgesic to boost the Codine of Hydrocodone, but because in just a little over the prescribed dose, it destroys the liver. In other words, the misguided drug-war caused our government to deliberately put a hepatotoxin in these pain killers so anybody who used enough to have much fun would also kill themselves.

Rush got to the point he was gobbling the pills before he got caught and went for rehab. Has anyone heard how he avoided destroying his liver while the party lasted?