Iron supplements can cause side effects, which are described on the packaging. Side effects can include constipation, diarrhea or an upset stomach. If these symptoms become bothersome, you should discuss alternative options such as a lower dosage with your health-care provider.
Taking iron can mask other health conditions that are more serious such as gastrointestinal (GI) disease. They may also be harmful to people who have an iron overload syndrome such as hereditary hemochromatosis. You should discuss your risk factors and health history with your health-care provider before adding iron supplements to your routine.
Although iron supplements are not usually harmful to adults when taken as directed, accidental ingestion of iron by children can be fatal. You should keep all iron-containing products out of the reach of children. In case of ingestion or emergency, seek medical assistance or call a poison control center immediately.