urinary tract infection
"I've taken this medicine about 7 times.  It works well for the UTI, and prior to taking it this last time I had little side effects.  This last time however was horrible. I couldn't sleep (not even a wink!)  was shaky, felt like I couldn't walk, sore everywhere, headaches from hell... all of these effects started to happen on the 5th day... the 7th day (last day) was the worst and continued for the next week. I like this medicine because it works for the UTI, but I will not take it again.  The side effects are scary."