Viagra generally refers to Sildenafil Citrate. It is not clear whether sildenafil citrate works in healthy people, but it is not recommended.Sildenafil citrate can be therapeutic for diseases of erectile dysfunction. Sildenafil citrate is indicated for the treatment of erectile dysfunction, as well as for the treatment of pulmonary hypertension in adults. It is not recommended for healthy people who do not have any of the above conditions, and without these conditions, there is no way to know whether it works or not. It may also cause discomfort such as headaches, visual disturbances, hearing impairment, and ejaculation disorders due to side effects in healthy people. Sildenafil citrate is contraindicated in patients taking nitrate drugs such as nitroglycerin, isosorbide nitrate, and isosorbide nitrate. Sildenafil citrate is contraindicated in patients with known hypersensitivity to any of the ingredients in this product. When you need to take this drug you must do so under the supervision of a medical professional, do not take the drug on your own.