Tadalista contains 40 of tadalafil. It also comes in various strengths, and depending on how severe the patient's condition is, alternatives that also come in various strengths are suggested. In order to treat erectile dysfunction, the active component of tadalafil,Tadalista 40 , a PDE-5 inhibitor, relaxes the muscles in the penile blood vessels and increases blood flow to the penis. It also reduces pulmonary hypertension by facilitating increased blood flow via the blood vessels in the lungs.