Tadalafil is sometimes taken as needed, usually at least 30 minutes before sexual activity and not more often than once every 24 hours. Blood pressure tablets known as alpha-blockers, also sometimes used to treat prostate enlargement – includes doxazosin, prazosin, alfuzosin, terazosin, indoramin, and tamsulosin. Daily use of “on-demand” medication is not recommended. 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. Ask your pharmacist for a list of the ingredients. Tadalafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow more easily.Both Cialis and tadalafil treat ED at the following doses: mg. 5 mg. 10 mg. 20 mg. At 20 mg, both drugs are also approved to treat symptoms of benign prostatic hyperplasia (BPH), such as difficulty urinating. They work by relaxing the muscle cells in the prostate, allowing urine to flow out of the bladder. How does this compare with the cost of other strengths ( mg, 5 mg, 10 mg)? Cialis comes in several strengths: milligrams (mg), 5mg, 10 mg, and 20 mg. The Cialis cost per pill and daily cost. Generic Cialis (tadalafil) is available in mg, 5-mg, mg, mg, and mg tablets for daily or as-needed use. The prices for either Cialis or tadalafil can change from time to time.