Ferosac is used to treat severe iron deficiency, especially when it is caused by bleeding or blood disorders related to the digestive tract. Ferosac is a fast-acting solution to get rid of iron deficiency in the body, which can cause many health problems such as anemia. Iron plays an essential role in the production of hemoglobin in the blood, and its deficiency leads to general weakness and severe anemia, which negatively affects health in general.