Phenazopyridine
interstitial cystitis
"When the pain of interstitial cystitis hits, it's awful. One or two doses of this fantastic medicine always either eliminates the pain or makes it barely noticeable. I don't need it daily. But when I do need it, I want it on hand. It's the best thing I can find and that I trust for the pain of interstitial cystitis. Also, I consider it safe and it has no side effects."