Vidalista 40 mg is used to treat impotence in males. The drug contains an active ingredient called tadalafil, which helps relax the muscles by increasing blood flow to the penile arteries. This medicine can be used 1 hour before intercourse to enjoy a strong erection. This drug improves your sexual performance. Alcohol should not be consumed while taking this medicine. The effect of this medicine lasts for about 36 hours. This medicine should be used only on the advice of the doctor.