Captopril does not have a strict time for taking it and can be taken either before or after breakfast or dinner. Captopril is clinically used to treat high blood pressure and heart failure. Depending on your condition, you can choose to take the drug before or after breakfast and dinner. In case of gastritis, gastric ulcer and other diseases, you can choose to take the drug after meals. Its common adverse reactions include rash (itching and fever), palpitations (rapid heartbeat, often accompanied by panic), tachycardia, chest pain, cough, and dullness of taste. Contraindications to captopril are mainly seen in people who are allergic to captopril or other angiotensin-converting enzyme inhibitors and in pregnant women. Captopril needs to be taken under the guidance of a professional doctor.