Tadalafil, an active ingredient in Vidalista 80 mg, is a member of the PDE5 inhibitor class and is used to treat erectile dysfunction or impotence. It increases nitric oxide, inhibits the PDE5 enzyme, and relaxes the blood vessels in the penile system. These lead to improved blood flow, which in turn produces greater erections. It is appropriate for selecting the time of sexual contact because it begins to function in 30 to 60 minutes and has effects that can last for 36 hours. Alcohol will reduce the efficiency of Tadalafil, so avoid drinking it while taking it. Patients under the age of 24 should not be prescribed the medication by doctors.