Tadalista 20 mg contains Generic Tadalafil Cialis 20 mg. So, if you happen to suffer from pulmonary arterial hypertension and you are taking Tadalafil 20 mg or even some other dosage of this drug like Tadalafil dosage 40 mg or any different kind of PDE5 inhibitors like Vardenafil or Sildenafil, ensure that you do not take Tadalista.