Viagra is composed of sildenafil, 4 years after cardiac stenting, if the condition is stable, you can take sildenafil appropriately under the guidance of a physician. Sildenafil can be used clinically for the treatment of erectile dysfunction, and adverse reactions such as fatigue, thirst, and edema may occur after the use of this drug. Patients who use nitrates and are allergic to this product should not use this drug. Patients after cardiac stenting, if their condition is relatively stable, they can have sex appropriately. For coronary heart disease patients with sexual dysfunction, if the condition is relatively stable, you can take sildenafil orally appropriately, but you should choose the right dosage under the guidance of your physician to avoid damage to the heart, and you should not use the drug without authorization.