urinary tract infection
"So I went in on tuesday for a uti but no bacteria showed up so the doc prescribed the generic macrobid and the first pill I took was on Wednesday i ended up having a severe headache 30 minutes later and got a slight fever all day and took the 2nd pill. The next day I woke up feeling great and took the medicine again leaving me with a terrible headache again. So that night I did not want to take it what so ever.  Then Friday came (today) and I went back in for a different medicine and my head didn't hurt really at all but I found out I still had a temp of 100.1. This pill has given me the worst with terrible headaches and a fever. Definitely doesnt work with me. Bdid slightly help whatever I have going on but not as quick as others"