Vidalista black 80 is a drug used to treat pulmonary hypertension. It is a phosphodiesterase type 5 (PDE-5) inhibitor and helps to relax blood vessels in the lungs. Tadalafil inhibits PDE-5, causing a reduction in the amount of another substance called cyclic guanosine monophosphate (GMP). This decreases the pressure in pulmonary arteries. It also allows the lungs to receive more oxygen. This is beneficial to people with pulmonary hypertension and can improve their quality of life. As a result, Vidalista 20 mg is often prescribed to patients with pulmonary hypertension who have not responded to other treatments. It may also be prescribed to patients with pulmonary hypertension who are unable to take certain medications or have side effects from other medications.