The side effects of contraceptive pills are: 1. Early pregnancy-like reactions, such as fatigue, nausea, vomiting and other reactions similar to early pregnancy can occur in the early stage of taking the drug, no special treatment is needed, and the symptoms can disappear naturally after several cycles of taking the drug. 2. Vaginal bleeding, which mostly occurs when the drug is missed, a small amount of bleeding does not require special treatment, and can be reduced to disappear after taking the drug for a longer period of time, and the amount and duration of bleeding is similar to menstruation. 3. Amenorrhea, mostly occurs in women with irregular menstruation, except pregnancy. 4. Weight and skin changes, individual women with hyperphagia and weight gain, a few facial hyperpigmentation, estrogen leads to water and sodium retention resulting in weight gain, androgenic activity of contraceptives decreases progesterone activity and side effects are reduced. 5. Liver function damage, regular liver function checks are required during the drug taking period. 6, Breast pain, etc., can be treated symptomatically or discontinued for further examination.