Tylenol as we know it has been used in households and sold over the counter for half a century now. The drug is about as commonly found in households nowadays as swimming trunks.
As far as pain killers go, it is relatively harmless, especially in comparison to the previous pain reliever of choice, Aspirin, which has been largely discontinued due to its negative side effect.
Tylenol markets a number of projects, including Tylenol PM, and Tylenol 3 with codeine, among many others. Tylenol is known for its value as a pain-killer, for reducing fever,and for relieving flu symptoms. Some variations of the drug are also anti inflammatory and can be taken to reduce swelling or infection.
Although Tylenol has been gladly used by many a woman with menstrual cramps, people with migraines, and children with the flu for decades, if taken in too-large doses, it can be injurious, or even fatal. An overdose of acetaminophen, which is the active substance in Tylenol, can cause kidney and liver failure, and can be fatal when combined with alcohol.