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.