The first time you take oral contraceptive drugs, there will be more or less damage to your body, as follows: i. There may be confusion of intestinal functions, nausea, vomiting, abdominal pain, and even diarrhea in the stool may occur. Second, there can also be breast swelling and pain, because birth control pills contain certain estrogen and progestin, which may cause the blood vessels in the breast to expand. At this time, there may be pain, it is recommended that local massage or hot compresses to relieve, usually 3-7 days will slowly end. Third, the appearance of early menstruation, or even delayed, because the contraceptive drugs are hormonal drugs, it will interfere with the body’s endocrine hormone changes, may cause the menstrual cycle confusion three months of the situation. Fourth, at the same time may also cause withdrawal bleeding, withdrawal bleeding belongs to the adverse reaction of the drug and caused by the breakthrough bleeding, 3-7 days will end, can automatically heal, do not give treatment. Because each person’s constitution is different, some people may exist with such performance, some people will not exist with this performance, it is recommended to observe after taking oral contraceptives.