Silagra 100 is marketed under the brand name Viagra. There are several brand names for sildenafil available on the market since each company has a unique name for their product. Sildenafil is the primary active ingredient in all of these tablet brands. The drug used to treat male erectile dysfunction, or impotence, is called sildenafil (ED). Moreover, sildenafil is used to improve sports performance in patients with pulmonary vascular hypertension. Since this medication is a prescription, take it exactly as directed by your physician.Before using Silagra 100mg, review its side effects.