According to Tylenol manufacturer Johnson & Johnson, acetaminophen, the active ingredient in Tylenol, is used by 50 million Americans each week to treat pain, fever, and the aches and pains associated with cold and flu. It’s become as common as aspirin.And like aspirin, this over-the-counter drug is assumed to be quite safe. In fact, it gained its reputation as being safer than aspirin and the other non-steroidal anti-inflammatories (NSAIDs) because it was, as a famous actress told us in a TV ad, “gentle on the stomach.” Translation: it doesn’t cause gastrointestinal bleeding, while NSAIDs do. Then why would neurologist and pain management specialist Aric Hausknecht, M.D., call it “by far the most dangerous drug ever made?”Perhaps because, although when used in low doses its side effects are generally mild, it is notoriously over-dosed when used to address pain. According to the National Institutes of Health, acetaminophen overdose poisons the liver and leads…