I had coffee very late last night. Everyone was drinking beer and I opted for coffee instead. We were yelling PICTURE! last night and hence I need the coffee. I never had problems with coffee and sleep well after drinking it. But after drinking last night, I could go to bed at all! I was very sleepy but my brain was working real hard, thinking of so many things at one time. There is a website where I can find more about sleeping aid review of many brands. It sure helps me sleep better.