urinary tract infection
"I get UTIs pretty frequently, so as soon as I felt the symptoms coming on I went to an urgent care.  The first day of macrobid I got a headache. The second day I had severe headache, body aches, weakness and malaise.  However, I thought it was just my illness, because I have never had an experience like this with medication before.  Day 3, I am in hell and sicker than a dog. Severe headache, nausea, light headed, weak, fatigued. I called in for Bactrim.  DO NOT TAKE THIS MEDICATION. I get that not everyone has this reaction, but the risk is not worth it to me."