Doctors in the past dynasties have emphasized this point for a long time and specially compiled \”Pregnancy Prescriptions\”, which lists dozens of drugs that should not be used during pregnancy, divided into two categories: contraindications and caution. Pregnant women should not take highly toxic drugs, such as cantharides, spurge, croton, morning glory, pokeweed, aconite, saponins, araceae, etc. They should be contraindicated to avoid endangering the safety of mother and baby. Pregnant women should not take laxatives such as Glauber\’s salt and rhubarb