Vigora is also known as Sildenafil Citrate and is widely used to treat Erectile Dysfunction in men.Vigora is part of the PDE 5 (Phosphodiesterase Type 5) inhibitors family. It contains Sildenafil citrate as an active ingredient. It comes in an oral tablet with a red color. It blocks the enzyme PDE 5’s action and increases blood flow to the penis.Erectile dysfunction is a condition that causes blood to clog in the penis, making it more difficult for men to have an erection. As a result, blood can flow freely to the penis. Pressure is created when more blood flows to the penis. This leads to an easier erection.