how do you tell if the symptoms you have are due to depression or the side effects of your medication?? i'm taking cymbalta, and have been stuck in a mental fog and confusion. it's also knocking me out like crazy and making me sleep for very long periods of time. those could be symptoms of depression or those could be side effects. at first, i thought they were side effects, but now, i'm not so sure anymore because i can't even think straight. i can hardly remember anything, too. it's a bugger. my pdoc and i are trying figure this out. of course, it will take time, too. but, it's difficult to tell between the two, though. it's strange to be stuck in such a heavy mental fog. i've done plenty of boneheaded stuff because of it. yeah, i'm laughing at funny stuff, but i quickly forget them. it's like i've been in a walking coma. any tips on telling the difference would be greatly appreciated, since i'm kind of an oddball case for my pdoc, and he really doesn't know for sure (he's one of the best there is that i could find - he's professor).