No, it’s not Harmless to get an 80-mg dose of Cialis. The most recommended day-to-day dosage of Cialis is 20 mg a day if you're taking it as needed for ED. If you are taking Cialis everyday, the most dosage is 5 mg every day.Non è noto se tadalafil sia efficace in pazienti che sono stati sottoposti a chirurgia pelvica o a prostatectomia radicale