Nitrofurantoin
"I was prescribed MacroBID after previous three antibiotic courses failed (1st Cipro made me violently ill, 2nd and 3rd were amazing drug Selexid with zero side effects and almost immediately relieved symptoms, however both times UTI returned after a week). Delayed starting the pills due to travelling and not wanting any of the awful side effects I'd read about this drug but my doc warned me of the infection spreading to kidneys so I risked it. I made sure I took a snack and some milk 10min before and swallowed with plenty of water and honestly no side effects, 5 days in only noticed runny nose but nothing else. UTI cleared up within a day too so I would highly recommend trying this, and not worry too much about the negative feedback"