Brand-name versions of the drug approved for PAH include Adcirca. How Effective Is Cialis? Read it again each time you refill your prescription in case there is new information. Though this growth is not cancerous, prostate cancer and BPH can co-occur. Tadalafil works for these conditions by promoting muscle relaxation, which improves blood flow in PAH and urinary flow in BPH. From Mayo Clinic to your inbox Sign up for free and stay up to date on research advancements, health tips, current health topics, and expertise on managing health.The strength of these tablets generally ranges from to 20 milligrams (mg). Tadalafil tablets can either be taken once per day or as needed. If you’re taking them once per day, your doctor. Save up to 97% on tadalafil cialis with GoodRx Different pharmacies offer different prices for the same medication. GoodRx helps find the best price for you. like mg or 5 mg. The 20 mg tablet is the highest strength and is often not preferred because it has the potential to cause erections that last a full day. Dosage will vary from. tadalafil 20 mg tablet. Color: light yellow Shape: oval Imprint: T This medicine is a yellow, oval, film-coated, tablet imprinted with “5” and “V”. tadalafil 20 mg tablet.