Other Forms of Generic NitrofurantoinOther forms of nitrofurantoin are available in generic form. Macrodantin® is similar to Furadantin but comes in capsule form. Like Furadantin, it is taken four times a day to treat urinary tract infections or once or twice a day to prevent them. Macrobid®, which also comes in capsule form, is taken just twice a day and is approved only for bladder infection treatment, not prevention.
Both Macrodantin and Macrobid are available in generic form.