Tadalafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow more easily. Your doctor will help you decide the best time for you to take tadalafil before sexual activity. Tadalafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus HIV. What special dietary instructions should I follow? Also tell your doctor if you have or have ever had pulmonary veno-occlusive disease PVOD; blockage of veins in the lungs ; any condition that affects the shape of the penis; diabetes; high cholesterol; high or low blood pressure; irregular heartbeat; a heart attack or heart failure; angina chest pain ; a stroke; ulcers in the stomach; a bleeding disorder; blood circulation problems; blood cell problems such as sickle cell anemia a disease of the red blood cells , multiple myeloma cancer of the plasma cells , or leukemia cancer of the white blood cells ; or heart, kidney, or liver disease. If you are taking tadalafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire.Cialis Prices, Coupons & Savings Tips – MDRx. DRUG_DESCRPTION Compare DRUG_NAME prices and find coupons that could save you up to 80% instantly at . Compare prices and print coupons for Tadalafil (Cialis) (Generic Cialis) and other drugs at CVS, Walgreens, and other pharmacies. Pay undefined at Walmart with a GoodRx discount. That’s 94% off the retail price of $ Walmart. $ retail. Save 94% (Cialis) cost? expand_more. The lowest GoodRx price for the most common version of. Remove. $ – +. $ Generic Cialis can be purchased online. Enjoy free shipping, overnight delivery, and other perks. There are different delivery and dosage options available.