Iron and calcium tablets should be taken at least two hours apart. Iron and calcium tablets, if taken at the same time, can affect the absorption of iron due to competition, which is detrimental to the correction of anemia. For patients with both iron as well as calcium deficiency symptoms, calcium supplementation is usually given on an empty stomach or before bedtime to avoid inhibiting the absorption of iron from food, preferably at night before bedtime to facilitate complete absorption of calcium. Iron can be chosen to be taken about half an hour after meals or between meals, which, on the one hand, can reduce the stimulating effect of iron on the gastrointestinal tract and avoid gastrointestinal reactions such as nausea and vomiting. On the other hand, it is also conducive to the absorption of the drug and strengthen the therapeutic effect. At the same time, it is important to pay attention to eating more iron-rich foods and getting more sunlight in order to help correct iron and calcium deficiencies. Avoid drinking milk, strong tea, coffee and other beverages at the same time to increase the utilization of trace elements.