When’s the last time you read the product information sheet folded inside the Tylenol® box before downing a couple of the pills to relieve your headache? Be honest. Chances are, the answer is never. Over-the-counter pain medications such as Tylenol are so commonplace we scarcely give them a thought. But we should. Tylenol, Excedrin®, Midol® and other store brands contain acetaminophen, which poses a risk for liver damage.