Amitriptyline
"I don't know if this is the only thing that works, because in addition, I take valium for spasms. Now, I have a problem, I cannot wake up, am groggy all day, feel tired all the time, worried while driving (80 miles each day), but I should also say that I have been tired prior to starting this. I take 1/2 of a 25 mg for over a month now, feel 300%, but then again for interstitial cystitis I'm also on Valium."