What side effects can prenatal vitamins cause?

One side effect of taking prenatal vitamins is that because they contain higher doses of iron than standard multivitamins, they may cause you to feel queasy, which in turn may lead to nausea and vomiting. To calm this reaction, experts recommend dividing the dose and taking a little at a time throughout the day, along with a snack. The larger dose of iron in prenatal vitamins also may trigger diarrhea.

On the other hand, the iron in prenatal vitamins may also bring on constipation. If it has this effect on you, try drinking more water and eating foods high in fiber. You may also want to talk to your health-care provider about taking a stool softener.

Based on information from iGuard.org, a free medication monitoring service, 15% of patients experience side effects while taking Prenatal Vitamins. Some of the side effects reported by iGuard members include: Abdominal Pain/Cramps, Nausea/Vomiting, and Constipation. Please follow up with your doctor or other healthcare provider if you are experiencing any symptoms that worsen or do not go away.

Continue Learning about Vitamins



In the United States, the Food and Drug Administration (FDA) regulates vitamin supplements and provides recommended daily amount information. The FDA says that we should pay attention when considering vitamin supplements, because ...

frequently many different vitamins and minerals are combined into one product.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.