Vidalista 40 is a medication used to treat erectile dysfunction (ED). It contains 40 mg of Tadalafil, which is the active ingredient. Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor, which works by increasing blood flow to the penis, helping men achieve and sustain an erection during sexual activity. Vidalista 40 is considered a stronger dose compared to Vidalista 20, and it provides longer-lasting effects, often up to 36 hours.