Generally taking birth control pills to drink more water is related to promoting drug metabolism and relieving symptoms of digestive discomfort. The main reason for women to take birth control drugs during pregnancy is the presence of abnormalities such as preeclampsia and preterm labor, such as mild abdominal pain and vaginal bleeding. Clinically, commonly used birth control drugs include progesterone capsules and dydrogesterone tablets. The reason why pregnant women taking birth control drugs should drink more water, mainly with more water can promote the body of the drug metabolism, so that the drug to give full play to its efficacy. At the same time, part of the birth control drugs will induce pregnant women to appear nausea, vomiting and other digestive discomfort, and drink more water can to some extent relieve the stimulation of the gastrointestinal tract caused by the drug. When taking birth control medication, avoid drinking carbonated beverages, strong tea, coffee, etc., in order to prevent reducing the efficacy of the medication or inducing the occurrence of other abnormalities. It is recommended that pregnant women take birth control drugs under the guidance of a physician, and should not use drugs indiscriminately or increase or decrease the dosage of drugs at will.