I had never heard of this before but they used to use it in the old days. It's one of the only category A drugs for pregnancy. I've been nauseated all day and vomiting once a day. I took my first dose last night and almost no nausea! And it's a better option to try than zofran. Plus I don't feel bad about taking it for intense nausea when it's a category A. My midwife gave me a sample to try before prescribing it.