Nifedipine extended-release tablets can usually be taken during preparation for pregnancy. Women with high blood pressure who need to keep their blood pressure within satisfactory limits during preparation for pregnancy can usually take nifedipine extended-release tablets. Nifedipine extended-release tablets belong to calcium antagonists, which usually have little effect on eggs, sperm, fertilization process, etc., and so they can usually be taken. If adverse reactions such as jaundice, glutamic oxaloacetic acid aminotransferase, chest pain, headache, flushing, blurred eyes, palpitations, drop in blood pressure, swelling of the lower limbs, itching, abdominal pain, nausea, loss of appetite, constipation, hypertrophy of the gums, and so on, occur after use, prompt medical attention is recommended. Use with caution in patients with hypotension, severe aortic stenosis, hepatic and renal insufficiency, and contraindicated in pregnant women, lactating women, and children. If you want to use nifedipine extended-release tablets for pregnancy, it is recommended to go to a regular hospital, consult a professional doctor, cooperate with the doctor to complete the relevant examinations, and avoid blind use of medication.