The drug insert for Captopril does not specify the side effects that can occur with long-term use. Side effects of Captopril include tachycardia, chest pain, cough, and dullness of taste; rarely proteinuria, dizziness, headache, angioedema, rapid and irregular heart rate, leukopenia and granulocytopenia, fever, and chills; and overdose of the drug can cause symptoms of low blood pressure. Captopril is mainly used to treat hypertension and heart failure. In addition, patients who are allergic to captopril or other angiotensin-converting enzyme inhibitors are prohibited, pregnant women are prohibited, autoimmune diseases, bone marrow suppression, insufficient blood supply to cerebral arteries or coronary arteries, high blood potassium, renal dysfunction, aortic stenosis, strict dietary restriction of sodium, or those who are undergoing dialysis should be cautious of using this drug. If you need to use captopril, it is recommended that you consult a professional doctor and follow the doctor’s instructions for standardized treatment, not blindly use the drug on your own.