Vilitra is used to treat men who have erectile dysfunction (also called sexual impotence). This medicine is a medication that helps you to get and keep an erection, so it can make you last longer in bed if you're finding it difficult to stay erect during sex. Generally, you can take this pill orally with a glass of water. But do not try to crush or chew the medicine; always swallow it as a whole. However, it is always best to follow the instructions prescribed by your doctor.