Vidalista 5 treats erectile dysfunction, a medical condition in which the penis is unable to achieve a strong erection when a man is sexually aroused. It helps in the treatment of erectile dysfunction by giving a strong erection to the penis when a man is unable to keep his penis erect. Every action a man performs during sexual activity is done to increase blood flow to the penis for a strong erection. The effect of this medicine usually lasts for 3 to 4 hours.