hi there, pregnidoxin has not conclusively been proven to be harmful to the fetus but it could cause some congenital malformations. The bottom line is that nausea and vomitting is a part of pregnacy and usually self limiting. So it would be best to avoid any medication for the same and just take some folic acid tablets which are good for the fetus and its CNS development in the 1st trimester. You could try these simple measures to reduce vomiting. Take small meals at shortl intervals.Try taking mostly dry toast or biscuits as snacks. Don t get up abruptly from the bed in the morning and take some dry biscuits before you take any liquids or brush your teeth. Usually by the 14th week of pregnancy the symptoms are much reduced and you just need to bide your time. Some amount of vomiting is normal in pregnancy adn as long as it is not dehydrating the patient or causing excessive weight loss it is ok.take care