Prenatal Vitamins & Folic Acid

Maternity & Reproductive

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Examples

folic acidironiodinecalciumvitamin D

Prefix / Suffix: vitamin/mineral names vary

Physiology

Pregnancy increases nutritional needs for fetal growth, placental function, maternal blood volume, and bone development. Folic acid is especially important early because the neural tube forms before many patients know they are pregnant.

Mechanism of Action

Supplements replace or prevent deficiencies. Folic acid supports DNA synthesis and neural tube development, iron supports hemoglobin production, iodine supports thyroid function, and calcium/vitamin D support bone health.

Indications

Pregnancy and preconception supplementation
Prevention of neural tube defects
Iron-deficiency anemia prevention or treatment
Nutritional support during lactation

Side Effects / Adverse Effects

Constipation and dark stools with iron
Nausea or GI upset
Metallic taste
Rare toxicity if fat-soluble vitamins are excessive

Contraindications

Iron overload disorders unless prescribed
Avoid excessive vitamin A/retinoids in pregnancy
Allergy to product components

Nursing Considerations

Encourage folic acid before conception and during early pregnancy
Teach patient to take iron with vitamin C if tolerated and avoid taking it with calcium at the same time
Assess constipation and encourage fluids, fiber, and safe stool softeners if ordered
Review all supplements to prevent duplicate high-dose vitamins
Reinforce that vitamins support pregnancy but do not replace balanced nutrition

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Disclaimer: PharmPal Nurse is for education only and is not medical advice. Do not use it to diagnose, treat, prescribe, or make patient-care decisions; always verify with current drug references, your instructor, facility policy, and a licensed provider. In emergencies, call local emergency services.