Comment by InsideOutSanta
7 hours ago
You're describing caffeine addiction. This also happens with coffee.
People at the office sometimes ask me how I manage to get up in the morning and be in a good mood without having a cup of coffee. I suspect that most of them are only in a bad mood after waking up because they have mild caffeine widthrawal.
That is likely true, but there are other factors. For example delayed sleep phase paired with fixed office work hours.
I bet many people that have a slight 1-2h shift compared to the average are using an early morning coffee to make things work.