Tadalafil is the active ingredient in Vidalista 40. Tadalafil improves blood flow to specific body parts by relaxing the blood vessel muscles. Typically, erectile dysfunction and benign prostatic hyperplasia symptoms are treated with Vidalista 40. Vidalista 40 has a longer duration of action, up to 36 hours, in contrast to other medicines in its class. Because of its prolonged period of efficacy, it has been dubbed "the weekend pill." Because alcohol and medication can combine to raise the risk of side effects, avoid drinking alcohol while taking the pills.