Short-acting oral contraceptives should not be taken over the age of 40 and need to be taken under the supervision of a physician if necessary. Short-acting oral contraceptives are the most widely used of the female contraceptives and are compound oral contraceptives synthesized from progestin and estrogen. Short-acting contraceptives are all compounded contraceptives, and the main contraceptive mechanism of compounded contraceptives is to inhibit ovulation, so contraception is highly effective. Adverse reactions mainly include: Class early pregnancy reaction: manifested as nausea, vomiting, drowsiness, dizziness, loss of appetite. Breakthrough bleeding (most often occurs when the pill is missed; if necessary, 0.01 mg of ethinyl estradiol can be added nightly), amenorrhea. Mental depression, headache, fatigue, weight gain, facial hyperpigmentation. Impairment of liver function or increased relative risk of benign adenomas of the liver. Increased risk of ischemic heart disease in smoking women over 35 years of age. May cause high blood pressure. It is contraindicated in people with the following conditions: Breast cancer, cancer of the reproductive organs, irregular bleeding from the vagina, abnormal liver function or recent history of liver disease or jaundice, deep vein thrombosis, cerebrovascular accidents, hypertension, cardiovascular disease, diabetes mellitus, hyperlipidemia, psychiatric depression, and women over 40 years of age.