If you drink a large amount of alcohol more than five glasses of wine or five shots of whiskey while you are taking tadalafil you are more likely to experience certain side effects of tadalafil such as dizziness, headache, fast heartbeat, and low blood pressure. One of these is PAH. No side effects were reported in sexual partners. Do not stop taking tadalafil without talking to your doctor. In BPH, the medication relaxes the urinary tract and bladder muscles, allowing for more effortless urine flow. In trials of the drug, individuals taking Cialis saw a significant reduction in the frequency and urgency of urination and improved urine flow.Compare prices and print coupons for Cialis (Tadalafil (Cialis)) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ Welcome! You’re in GoodRx Provider Mode. Does Cialis have a manufacturer coupon? expand_more. A manufacturer coupon or copay card is not available for Cialis. However, GoodRx discounts are. We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, known as . Cialis is Food and Drug Administration (FDA) approved to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BHP). Generic tadalafil became more widely available after