As of now, there is no generic brand available for Tadalafil which is one of the factors that make the prices steep and because there is no competition in the market. What special dietary instructions should I follow? Some pharmacies even provide discount coupons for every refill and free of delivery charges if bulk orders. Cialis is manufactured into 2. But manufacturers offer coupons to make the drug affordable for the public consumer. You should only be treated with one of these products at a time. Some might experience headaches, back pain, or flushed skin.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 . Costco Pharmacy – Parkway Blvd. Costco Pharmacy. -. Parkway Blvd. Look up the cost of your prescription: Popular: Lipitor, Cialis, Neurontin, Prilosec. Tadalafil (Cialis) is used to treat erectile dysfunction (ED, impotence; inability to get or keep an erection), and the symptoms of benign prostatic hyperplasia (BPH; an enlarged prostate) which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency in adult men.