Have never taken this drug before, have taken Cipro and Bactrim, with excellent results. However, now that have been off the Macrobid for one week, have been itchy, with large red, welts all over my lower body, neck, and waist. Before using this medicine, consult your doctor or pharmacist if you have: kob macrobid online severe kidney disease. During pregnancy, this medication should be used only when clearly needed. No longer have any antibiotics and the Dr says other antibiotics will cause yeast infections, and have higher risk of even worse side effects. The resulting increase in nitrofurantoin serum levels may increase toxicity, and the decreased urinary levels could lessen its efficacy as urinary tract antibacterial. Thought had developed pneumonia It cleared up the UTI, but it caused me to feel sick and lethargic for about days.