 [ Symptoms ] my daughter is husband took prescription prenatal vitamins on accident is this dangerous [ Disease ] prenatal vitamins are very similar to multivitamins the three elements that are most important for a prenatal vitamin are the amounts of folic acid iron and calcium typically a prescription prenatal vitamin has more folic acid andor iron than a nonprescription prenatal vitamin or a traditional multivitamin it would not be dangerous for your daughter is husband to take her prenatal vitamins by accident depending on the product he may have consumed more of some daily vitamins and minerals than is necessary but as a one time error this should not be harmful