what is macrobid for
Nitrofurantoin, sold under the trade name Macrobid among others, is an antibiotic used to treat bladder infections.It is not effective for kidney infections. It is taken by mouth. Common side effects include nausea, loss of appetite, diarrhea, and headaches.itrofurantoin, sold under the trade name Macrobid among others, is an antibiotic used to treat bladder infections. It is not effective for kidney infections. It is taken by mouth. Common side effects include nausea, loss of appetite, diarrhea, and headaches.