Spaw, you're right. But the danger comes when Tylenol is added to the prescribed med. Folks tend to think it's pretty benign, and it is, but when you're taking 325 mg. every 4 hours (in the combo drug) you're half-way to 4000 mg limit. Taking two prescribed pills every 4 hours puts you right up against the limit. Reaching for plain tylenol when the combo fails is all too common.