The metabolism time of anti-inflammatory drugs in the body is 3-5 days, so if you are preparing for pregnancy, you should be cautious when using anti-inflammatory drugs, and it is recommended to use penicillin or cephalosporins under the guidance of a physician for less impact. It is recommended to use penicillin or cephalosporins under the guidance of a physician for less impact. Some Chinese medicines can also be used under the guidance of a physician for relative safety. Other antibiotics such as erythromycin, ciprofloxacin, ketoconazole, etc. are recommended not to be taken. In addition hormonal drugs like hormones, sleeping pills, analgesics, anti-cancer drugs, antihistamines, morphine and birth control pills during pregnancy preparation are to be used with caution. If you accidentally take certain medications, it is recommended to extend the preparation time. If you get pregnant accidentally, you must do regular maternity checkups to rule out fetal abnormalities.