Nitrofurantoin
bladder infection
"Lower back pain gone after 1st day of this medicine. Nausea is horrible - taking phenegran to offset nausea. I'm lethargic and resting. This stuff must be strong - but I'd take bed rest and nausea over a knife in my back anyway!!! I'm on 2X daily WITH FOOD for 5 days. I'm on day 3."