Citalopram
"I've only experienced two side effects while taking this medication: lethargy, which is intermittent, and prolonged orgasm - which I enjoy.  It does it's job, making emotions much easier to control.  I thought taking this would make me happy all the time, but I didn't notice anything like a "switch" going on or off.  I'm glad, I still have emotions, they are just more muted - the bad ones.  Again, love this medicine for it's ability to prolong ejaculation."