North
American brand of a painkiller whose active ingredient is acetaminophen (AKA paracetamol outside North America).
Don't take more than the recommended dose of this stuff (or of any other paracetamol/acetaminophen
based painkillers). Overdose can cause liver failure, a fairly unpleasant way to die.
There are tales of people overdosing on tylenol/paracetamol pills one evening, and waking up the next morning feeling sheepish... they go about their business as
normal, then later that afternoon start to feel really
ill, get rushed to hospital and die shortly afterwards because their liver is knackered.