What are the side effects of ferrous sulfate with folic acid?

Ferrous sulfate and folic acid supplements may have side effects. Iron’s side effects may include:
  • Constipation
  • Nausea
  • Diarrhea
  • Heartburn
  • Temporary teeth staining
  • Allergic symptoms
  • Hemochromatosis, or excess iron
Normal doses of folic acid have been shown to be safe. If any side effects do develop, they may include:
  • Allergy symptoms
  • Nausea
  • Flatulence
  • Bad, bitter taste
  • Altered sleep patterns
  • Difficulty concentrating
  • Irritability
  • Depression

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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.