Iron is commonly used in patients with iron deficiency anemia, and it is generally recommended to take it 30 minutes after meals to prolong the stay time of iron in duodenum. However, in recent years, the study of chronopharmacokinetics found that the absorption rate of iron intake at 7 o'clock in the evening was 1 times higher than that at 7 o'clock in the morning, which was the best time for iron intake.

Iron should be taken from a small dose, and those with severe reaction can stop taking medicine for several days, and then start from a small dose until the required dose. It should be noted that even if you return to normal, you can't stop taking the medicine. You should take 1 month at least, and then gradually reduce it for 2 ~ 3 months, so as to really restore the normal level of iron storage in your body. Otherwise, once iron supplementation is stopped, anemia will come back again and the treatment will start from scratch.