Hi, I am a 40 yr. old, female, 5 3 , 120 lbs. I get quite a bit of UTIs. I am allergic to Cipro and was put on Macrobid for 10 days. A week after completing the Macrobid; I developed hives, which have lasted for 2 weeks so far. Anything pressing on my skin will turn into welps. My PCP has told me I can no longer take those antibiotics. I am unclear if he s referring to those 2 particular antibiotics or sulfa antibiotics??? Also, if I develop another infection, is there something else that can be prescribed?