Shortstory - man takes a pill and then can see aliens

[adamwinkleman]

I'm trying to find a short story about a guy that takes an antidepressant pill that reactivates a part of the brain that's long been dormant, and allows him to see the Alien Creatures that are all around him, ruling the
world. I believe it may have been entitled "Happy Pill", but that's just
a guess.


Please help