depression
"I have been on Cymbalta for about 4 years.  Worst side effect is sweating, which can be annoying.  Also, if I lay down during the day, I can go to sleep at just about any time; so I don't lay down.  Much less sexual side effects than other anti-depressants I was on (several of them).  Since there is no generic, it is a bit expensive, but I feel so much better than I did before, it is worth it!"