The use of drospirenone tablets for fetal preservation treatment will not cause side effects or fetal malformations if the dosage is normal. Excessive dosage may cause adverse reactions such as aggravation of pregnancy reaction and mental abnormality, and it is necessary to strictly follow medical advice and not to increase the dosage. 1. aggravation of pregnancy reaction: pregnant women may experience nausea, vomiting, drowsiness, dizziness and other adverse symptoms, and if it is the period of pregnancy vomiting, aggravation of pregnancy vomiting reaction may occur. 2. mental abnormality: pregnant women may experience mental tension, and in serious cases, depression, which affect the secretion of hormones in the body. Patients with a history of depression should be closely observed during the medication; 3. Other: there are also side effects such as breast swelling, headache or migraine, which should be further examined and treated in hospital. In addition, pregnant women may develop skin and subcutaneous tissue disorders, such as rash and hives, but they are rare.