And if it was food making you sick, ask your doctor what you could do to help ensure your baby is getting it's proper nutrients if that ever happens again.
I don't have a for sure answer on that or not.. but since food wouldn't go down you could do a few things... Either ask your doctor to give you a new prescription for prenatals..try one until they don't make you sick... Or buy some Flinstone Gummies Vitamins that you can chew two a day of and there just as good as the prenatals.
Did you stop taking them after you became pregnant? Its not that it well for sure have any affect on your baby but they do give some reasurance that your giving the baby addition vitamins needed during a very important part of their life (during the main development) its not reccomended not to take them anyway but there isnt a for sure answer to the effect it can have or not have...