This is probably obvious to a lot of people, but I thought it still might be useful since I didn't think of it myself for years. Since sometime in college, I've been the kind of person who wakes up groggily at 10 am and then drags myself out of bed. I've always been a late sleeper so I didn't think much about it, but when I stopped taking allergy pills, I fairly quickly became someone who woke up around 8:30 am without much effort (still not early but not crazy-late).
