Vidalista 40 is another variation of the medication used to treat erectile dysfunction (ED) in men. Like Vidalista 20, it contains Tadalafil as its active ingredient. Tadalafil works by increasing blood flow to the penis during sexual stimulation, which helps to achieve and maintain an erection. The effects of Vidalista 40 can last for up to 36 hours, providing a longer window of opportunity compared to some other ED medications.