No, it’s not safe to acquire an 80-mg dose of Cialis. The most advised each day dosage of Cialis is 20 mg every day if you're taking it as necessary for ED. If you take Cialis day by day, the utmost dosage is 5 mg each day.an erection that won't disappear (priapism). If you have an erection that lasts more than 4 several hours, get clinical enabl