Ferrous gluconate is used to treat or prevent anemia caused by iron deficiency (a lack of red blood cells caused by having too little iron in the body). It also may be used when you have other causes for anemia such as chronic inflammation or blood disorders. Iron is needed for healthy blood formation and function of many different parts of the body. Iron is also a key component in hemoglobin, which carries oxygen throughout the body. Without enough iron, your blood can become stale-smelling due to increased levels of carbon dioxide because less hemoglobin is present to carry it away. Also absent will be any bright red color because there are no sufficient amounts of red blood cells to carry it all. When used along with other medications, especially antibiotics, care must be taken not to have more than the recommended amount of iron given at one time because this can lead to toxic effects. There have been reports of people suffering from hyperactivity, depression, and anxiety after taking ferrous gluconate for several months without knowing it. If you are thinking about using this medication, talk to your doctor first to make sure it's right for you.