I was going to say the same. Macrobid, is often used to prevent or fight bladder infections and is not the same thing.
It sounds similar.
I was on Macrobid for several years.
I use a natural product now.

Like I think Elaine and Caroline have mentioned here,
I too have had good luck using natural products for a variety of things.

I saw (heard) on The Truth About Cancer series on TV, a doctor, who did not want to show his face, say (I'm paraphrasing) that meds with questionable studies are sometimes pushed through the FDA in very inappropriate ways and one way the FDA might be working its away around this is to use the black box warning.

My thought was...stay far away from a med with a black box warning.