bladder infection
"Had a severe bladder infection..passing blood clots in my urine, pain, bladder spasms and urinating every 5minutes. I am allergic to sulphur drugs, penicillin, cipro & levaquin, so macrobid is really my only alternative. This is the second time I have taken it, the first time I remember no real side effects, this time I have experienced severe headache after the first 3 pills, then that subsided. Now, on my 12th pill out of 14, I have mild nausea and dizziness and drowsiness...nothing unbearable and definitely better than the pain of the bladder infection. Hopefully, I won't get another bladder infection, but that's wishful thinking, but I won't hesitate to use macrobid again."