Nitrofurantoin
"I had no problem with this medication and my body is the anti-antibiotic! I am allergic to every antibiotic under the sun and avoid using them as much as possible, but I did not nip this urinary tract infection in the butt before it required a Dr.'s visit. I was instructed to take the pill twice a day for seven days. The first two days the medicines did make me feel a little drowsy, but I think my body adjusted. Just make sure you give yourself time to know how it will affect you before driving etc. I also would suggest taking it with a full meal. I did not experience any nausea, but I made it a point to only take my pills with a full stomach. I noticed results by the third day. I just finished the last dose and am feeling great."