Vilitra is used to treat impotence or erectile dysfunction in men. This drug is another form of Vardenafil drug. These other forms are called common forms. Vilitra is a PDE5 inhibitor. It increases blood flow to the penis to gain and maintain erection. The dose of this drug varies depending on the severity of the condition in men. This medicine should be taken only after consulting a doctor and discussing its benefits and consequences. However, some of the common side effects from taking this disease are nausea, headache, fever, eye pain, cold, blurred vision etc.