Deferiprone is a progestational hormone that may cause different effects if a single dose is missed, due to different uses and different health conditions of individuals. It may have no effect, or it may cause abnormal bleeding or have an effect on the preservation of pregnancy. 1. If this product is used for the treatment of irregular menstruation, functional bleeding, prevention of bleeding and other diseases, the omission of a dose of the drug may lead to irregular vaginal bleeding, but subsequent use in accordance with the normal dosage and time can be. 2. If this product is used for the treatment of preeclampsia, habitual abortion and other diseases, if the leakage of a dose may cause more or less impact on the body of the fetus, generally do not need to make up for the dose, as long as the subsequent use of medication in accordance with the normal dose and time to take can be. Adverse effects of dydrogesterone mainly include irregular uterine bleeding, migraine and other symptoms, with progesterone-dependent tumors, unexplained vaginal bleeding, severe liver dysfunction, allergic to the product should be prohibited. Hormonal drugs try to avoid missing drugs, the use of specific drugs is recommended under the guidance of a professional doctor, do not judge the use of drugs on their own to avoid danger.