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Hello Anonymous,

Welcome to EmpowHER. Thank you for reaching out to our community about ferrous sulfate.

Ferrous sulfate is a type of iron. You normally get iron from the foods you eat.

Side effects include constipation, upset stomach, black or dark colored stools, and temporary staining of the teeth.

Anonymous, please call your physician. I am concerned that you are having severe stomach cramps, diarrhea, vomiting and loss of appetite.

Regards,
Maryann