urinary tract infection
"Horrible! I tried this once and it worked
 Second time allergic reaction 3rd time my Dr prescribed it anyway and I almost died. Woke up after 2nd dose unable to breathe. Fever of 105. Bone and muscle pain. Crushing chest pain. Blue hands. Swollen tongue and face. Rash all over body. This is the worst drug out here. Do not use Macrobid. It's a nightmare!"