Pain
"Took one capsule before going to bed for a week to help sleep (arthritis). Had a reaction of hypertension and tachycardia.  Stopped taking anything extra beside regular meds.  Took it again about a month later.  Had the same reaction, only much worse.  Ended up in the OR.  Realized what the cause was.  I have never taken anymore and condition has not returned after three months.  My doctors were not aware of this reaction from Tylenol until I found this site."