Wonza For Vital Vigour Tablets is used to treat erectile dysfunction that works by increasing the blood flow to the penis. It helps men to get or maintain an erection. It belongs to a group of medicines known as phosphodiesterase type 5 inhibitors. Wonza For Vital Vigour Tablets has the property of relaxing the smooth muscle of the blood vessels and widening them which can cause a fall in blood pressure. It is best used with blood pressure lowering medicines or nitrates, which can cause a severe fall in blood pressure, which could be fatal.