What To Do For The Effect Of Drinking Nyquill Syrum?

I drank roughly Half a small bottle of Nyquill syrum 44 which contains acetaminophen. When I woke up I was a little dizzy and had a small amount of stomach discomfort but both subsided when I ate. I drank roughly a gallon of water immediatly after realizing that I had ingested to much acetaminophen. should i be woried about hypotoxicity.