Nitrofurantoin
urinary tract infection
"Was prescribed 3 days of trimethoprim for a UTI and they didn't touch it. I'm now on day 6 of a 7 day course of nitrafurantoin and I have had terrible diarrhea and stomach cramps. My wee has also turned a bright yellow which I'm concerned about since I thought it only turned dark yellow or brown on these tablets. Anyway, my UTI symptoms don't seem to have gotten any better."