Nitrofurantoin
"I took it for frequency and burning and hesitancy that I had. I couldn't even walk. But 30 minute after taking it all my symptoms where gone Now today (3 day after first dosage)  I have a terrible headache and I'm hungry, I am nauseated but not always. I'm just thinking about those poor animals that they test this drug on them.  I also experience cramps and watery diarrhea first day after taking this drug"