The drug is called Diclegis.
Doctors may prescribe it to pregnant women who can't control their nausea through diet or other means.
It's taken once a day on an empty stomach.
The drug's main ingredients are vitamin B6 and an antihistamine.
It was pulled off the market when it was known as Benedictin, over concerns it was causing birth defects, but the FDA says new studies prove it does not pose any risk to the fetus.