After taking the emergency contraceptive pill, if you do not eat properly or take other drugs, it may affect the effect of the emergency contraceptive pill and lead to contraceptive failure. It is generally recommended not to eat anything before and within two hours after taking the emergency contraceptive pill to facilitate the absorption and utilization of the emergency contraceptive pill and to reduce the burden on the gastrointestinal tract and reduce the possibility of nausea and vomiting. Be careful not to drink alcohol or smoke after taking the emergency contraceptive pill to reduce the burden on the liver and stimulation of the ovaries. Try not to take other drugs during taking the emergency contraceptive pill, especially macrolide antibacterial drugs such as erythromycin, azithromycin, roxithromycin, antifungal drugs such as fluconazole, itraconazole, H2 receptor blockers such as cimetidine, famotidine, etc.