No, it’s not Secure to just take an eighty-mg dose of Cialis. The maximum advisable daily dosage of Cialis is 20 mg every day if you take it as necessary for ED. If you are taking Cialis day-to-day, the maximum dosage is 5 mg per day.an erection that won't go away (priapism). Should you have an erection that lasts much more than four hours, get p