Buspirone
"Thought this was a miracle drug for me. At first I was taking 5 mg a day twice a day with no side effects. NO SIDE EFFECTS, it was a dream!  Since I tried all the SSRIs with no luck, due to intolerable side effects I had very high hopes.  Once day six came around I started to feel the drug working more.  That night I came home after working two 12 hour shifts back to back,  and I had the worst insomnia of my life. I have NEVER EVER had trouble sleeping after my twelve hour shifts. I was up for almost 24 hours it was so bad and I was absolutely exhausted and miserable. Needless to say, I deemed the insomnia not worth taking this drug."