I learned something last week. I had a headache about noon while I was out in the shop. I did not want to go into the house so I looked and I had some generic acetaminophen. I don't know where it came from, probably the dollar store. It was acetaminophen PM but I thought that it would work just fine so I took two. By the time I went in for supper I could hardly keep my eyes open. After supper I usually read but I kept dozing off. I finally watched a couple of YouTube videos and went to bed. If I have a problem with falling asleep I know what to take.