BPH occurs when the prostate and the surrounding tissues become enlarged. Some pharmacies even provide discount coupons for every refill and free of delivery charges if bulk orders. It belongs to the drug class known as PDE5 inhibitors. How Effective Is Cialis? The enlarged prostate interferes with the normal flow of urine from the bladder and urinary tract, resulting in lower urinary tract symptoms, such as trouble urinating. Also, patients that are currently taking medicines with substances such as nitrates and guanylate cyclase stimulators should avoid Tadalafil to prevent unsafe drop or increase in blood pressure.Print Save Cialis Prices, Coupons and Patient Assistance Programs Cialis (tadalafil) is a member of the impotence agents drug class and is commonly used for Benign Prostatic . Tadalafil prices Oral Tablet. mg tadalafil oral tablet. from $ for 30 tablets. Quantity Per unit Price; 30 (2 x 15 each) $ $ $ $ $ Note: This is a drug discount program, not an insurance plan. Valid at all major chains including Walgreens, CVS Pharmacy, Target, WalMart Pharmacy, Duane Reade and. Cialis comes in several different strengths, including: milligrams (mg) 5 mg. 10 mg. 20 mg. The cost for these different strengths depends on whether you have insurance, your individual plan.