i take cymbalta. i had been on 60 mg. of it from april to july, and i ended up with side effects like, headaches, nausea, pure exhaustion, excessive sleepiness, mental fog and confusion. the most problematic for me were the mental fog and confusion. my dosage was reduced to 40 mg., and the mental fog and confusion lifted, so it's much better. plus, i don't have headaches or nausea anymore. when i was taking 60 mg. of cymbalta, i had so much fog in my head that i did a few boneheaded things because i couldn't think straight. the funniest one was pouring melted wax down the kitchen sink drain and clogged up the sink. fortunately, my husband was able to fix that. i knew better than that, but i was so foggyheaded at the time. lol