Vidalista 40 mg contains tadalafil citrate which is the generic ingredient for Vidalista 40 which is used to treat erectile dysfunction in men. The ingredient Tadalafil helps men achieve stronger, harder, and longer erections during intercourse. This medicine works effectively when taken 30 minutes or 1 hour before intercourse. The effect of this medicine lasts for 4 to 6 hours. You can take this medicine before or after food. Take this medicine as per your doctor's advice.