For decades, sick people in search of a night’s rest — and high school kids in search of something to amuse themselves with — took Vicks NyQuil, and eventually woke up, often feeling like they’d hibernated for a season. Then they introduced DayQuil, which takes away all the fun of NyQuil, but supposedly lets you do your job without nodding out mid-meeting. More recently, Vicks added ZzzQuil and the bizarrely named QlearQuil, but what the H-E-double-hockey-sticks are they all about? [More]