Viagra is known as Sildenafil. Sildenafil can be used to treat patients with erectile dysfunction such as inability to have an erection or short erection time to complete sexual life.
Sildenafil is mainly suitable for patients with erectile dysfunction. Therefore, the drug is usually required only when erectile dysfunction exists, and sildenafil is not recommended for patients without erectile dysfunction.
Sildenafil is strictly forbidden to be combined with nitrate drugs such as isosorbide mononitrate and nitroglycerin to prevent severe hypotension. Some patients will have headache, facial flushing, dyspepsia and other adverse reactions after taking sildenafil, allergic to sildenafil, patients who are using nitroglycerin are strictly prohibited to use the drug.
Patients are advised to use the drug strictly according to the doctor’s instructions, and try to avoid using the drug privately or changing the dosage of the drug on their own.