Captopril tablets are not the same as nifedipine, and although both drugs can be used to lower blood pressure, the mechanism of action is different. These two drugs can be taken at the same time, or separately and separately. You need to choose the right drug according to your condition and under the guidance of a professional doctor. The mechanism of action of captopril tablets is to dilate the pre-glomerular arteries, and then inhibit the patient’s own angiotensin-II receptor, so that to a certain extent to play a role in lowering blood pressure, applicable to many types of hypertension and heart failure treatment. It is an angiotensin-converting enzyme inhibitor. The mechanism of action of nifedipine is to reduce the concentration of calcium ions, preventing the entry of calcium ions into the cells, thus inhibiting myocardial contraction to a certain extent, reducing the patient’s blood pressure. It is a calcium ion antagonist. Adverse effects of captopril include rash, pruritus, hypotension, tachycardia, palpitations (rapid heartbeat, often accompanied by panic), nausea, vomiting, anemia, and edema. Hypersensitivity to captopril or any of the excipients, or other angiotensin-converting enzyme inhibitors is contraindicated. It is contraindicated in pregnant women and used with caution in lactating women. Adverse reactions to nifedipine include headache, edema, vasodilatation, constipation, dizziness, palpitations (rapid heartbeat, often accompanied by panic). It is contraindicated in people who are allergic to the product and the ingredients contained in it, in patients with cardiogenic shock, during the first 20 weeks of pregnancy and in breastfeeding women. Not to be used in combination with rifampicin If the patient has high blood pressure, antihypertensive drugs should be taken according to medical advice. If the patient feels unwell while taking the drug, he/she should stop taking the drug immediately and consult a doctor. To avoid adverse reactions due to incorrect dosage or incorrect symptom of the drug.