Taking two birth control pills a day is effective in contraception, but at the same time, it is also more harmful to the body. Under normal circumstances, if a woman takes two packets of emergency contraceptive pills, twice a day, 12 hours apart, within 72 hours after intercourse, the effect is better than taking one pill, which can improve the success rate of contraception to a certain extent. It does not usually cause serious consequences, but may cause adverse reactions such as nausea, vomiting, dizziness and headache. Too much and too frequent use of contraceptive pills by women will lead to an imbalance of hormone levels in the body, triggering endocrine disorders. Not only will it lead to menstrual disorders, but in severe cases, it may also lead to premature ovarian failure and even infertility. Therefore, it is not recommended for women to take two birth control pills a day. If a woman does not intend to have children, it is recommended that she take scientific and effective contraceptive measures to avoid long-term use of contraceptive pills to cause serious harm to the body.