Generally, drinking water when taking the pill will not cause the effect of the pill to disappear, and the pill needs to be taken with water. There are three types of birth control pills: emergency contraceptive pills, short-acting contraceptive pills and long-acting contraceptive pills, but if you take emergency contraceptive pills, you need to avoid eating or drinking within 2 hours after taking the pills, so as not to have a certain effect on the effectiveness of the pills. When taking the pill, it is recommended to take it with warm water, not with drinks, tea, coffee or alcoholic beverages, which may affect the absorption of the drug components. Other adverse reactions may occur if taken together with drinks containing alcoholic ingredients. Drinking water while taking medication also has less effect on the action of the medication, so drinking water while taking medication should not be too much of a concern. Usually, emergency contraceptive pills can be taken within 72 hours of unprotected sex or contraceptive failure, but it is important to take them on an empty stomach. The time of taking the pill is proportional to the effect of pregnancy prevention, and the earlier you take it, the better the effect of pregnancy prevention. If vomiting occurs within 2 hours after taking the pill, it is necessary to take another dose. Short-acting contraceptive pills are taken in a cycle of 28 days and can be more effective if taken under the guidance of a doctor, as each person’s constitution is different. Long-acting contraceptives are taken on a monthly basis and usually provide longer-term contraceptive effects, but long-acting contraceptives should not be discontinued suddenly. However, if abnormalities such as menopause, nausea and vomiting occur, it is recommended to seek timely medical attention to improve the examination to rule out the possibility of unwanted pregnancy.