Vidalista 20 mg contains tadalafil, which is a PDE5 inhibitor used to treat erectile dysfunction. Tadalafil can improve erectile function by increasing blood flow to the penis during sexual stimulation, and a 20 mg dose may be recommended as needed based on individual response and tolerance. However, Vidalista 20 is not appropriate for everyone. It should not be taken with nitrate medications since the combination can result in a hazardous reduction in blood pressure.