Patients should seek prompt medical attention if their erection lasts longer than four hours. B No evidence of risk in humans Based on FDA pregnancy categories Do not start or stop taking tadalafil during pregnancy without your doctor’s advice. Get started by completing an online visit. Do not use in larger or smaller amounts or for longer than recommended. Take both tablets one after the other. Do not split the dose.Roman sells the following versions of Cialis: Generic: available in tablets of 5, 10, and 20 milligrams (mg), starting from $11 Daily Generic: available in doses of and 5 mg at $8 Branded. CIALIS for Use as Needed. Creatinine clearance 30 to 50 mL/min: A starting dose of 5 mg not more than once per day is recommended, and the maximum dose is 10 mg not more than once in every 48 hours. Creatinine clearance less than 30 mL/min or on hemodialysis: The maximum dose is 5 mg not more than once in every 72 hours [see .  · The Cialis brand of tadalafil is used in men to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate).. Adcirca and Alyq are used in men and women.