Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take. They include dutasteride Avodart, Jalyn and finasteride Propecia, Proscar. Its effects often last for 4 to 5 hours. One advantage Cialis has over Viagra and Levitra is its Kidney disease that needs to be treated with dialysis. It works for up to 36 hours.The lowest GoodRx price for the most common version of Tadalafil (Cialis) is around $, 96% off the average retail price of $ Read more about Tadalafil (Cialis) See more about Benign Prostatic Hyperplasia. Tadalafil, or generic Cialis, is most commonly used to treat erectile dysfunction (ED). However, it’s also used to treat benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension.  · But on average, its effects start to lessen 2 to 3 hours after you take a dose. The typical dose for once-daily Cialis for ED is milligrams (mg) to 5 mg. When used as needed for ED, the usual.