Took too many ferrous sulfate pills, need help and advice!?

Iron overdose: Usually, an excessive one-time dose of iron washes through your intestines and doesn't cause any side effects other than nausea, vomitina, and diarrhea. Too much iron over many months can cause iron build-up in your body and may require chelation therapy. You need to visit your healthcare provider and get appropriate testing depending on how much iron you have taken.