Navidoxine is a combination of Pyridoxine + Meclizine (Category B). It is prescribed for treatment of nausea and vomiting in Pregnancy. It has been shown to be safe for mother and baby, so you can take it as precribed by your doctor. If you have severe vomiting, take a Navidoxine tablet half hour after vomiting, and eat or drink after an hour. Always make sure you drink water or juices as much as possible even if you are unable to eat much.