Vidalista 40mg is an effective drug that is used to treat erectile dysfunction in men. It belongs to a group of medicines called PDE5 inhibitors. It works by relaxing the blood vessels in the penis to allow blood to flow into it when you get sexually aroused. It also helps to produce a hard erection after sexual stimulation. It is available in tablet form in 10mg, 20mg and 40mg doses. The 10mg tablets are prescribed for occasional use and the 20mg and 40mg pills are intended for daily consumption.