Nifedipine controlled-release tablets are contraindicated in pregnant women up to 20 weeks, and used with caution in pregnant women over 20 weeks. Nifedipine controlled-release tablets can be used for the treatment of hypertension and coronary heart disease, animal experiments suggest that it has embryotoxicity and teratogenicity may be prohibited for pregnant women within 20 weeks of pregnancy, for those who are more than 20 weeks pregnant, the current research and clinical experience is still insufficient, need to be weighed by the doctor and patient according to the needs of the condition of the pros and cons of the decision on whether to use. In addition, lactating women should not use the drug. Nifedipine controlled-release tablets are also prohibited in people who are allergic to it, cardiogenic shock, colorectal resection with ileostomy, and pregnant women should also be prohibited if they have the above conditions. Pregnant women with hypertension should use the drug under the guidance of a specialist and undergo regular follow-up examinations.