anxiety
"Within two days of starting Cymbalta, I had 'flashing lights' in my peripherals (which didn't go away for two years) and nausea. Not that big of a deal. But on day three, I was hit by an insane attack on what I assume was my central nervous system. I felt like my chest was in an ice bath, my internal temp dropped several degrees, my groin felt like it was on fire (burning/cramping), I started shaking and sweating and went into full blown panic. After taking a week off, I tried the drug again. Same thing. Absolutely awful. My doctors/pharms had never heard of these side effects, which were worse than my symptoms (anxiety-related feeling of throat/tongue swelling).

I switched to Effexor (SNRI), which finally worked."