In , the Phase 2 clinical studies were initiated for males experiencing ED, then progressed to the Phase 3 trials that supported the drug’s FDA approval. Start visit. How will Cialis be supplied? It can also interact with many medicines, particularly nitrates used in some types of heart disease and blood pressure medicines. What if I am taking other drugs?Brand-name Cialis. $20 for a single 5-mg oral tablet; $80 for a single or mg oral tablet; Daily generic Cialis (tadalafil) $8 for a daily mg or 5-mg tablet; Generic Cialis (tadalafil). stockcam / Getty Images What is generic Cialis? Generic Cialis is called tadalafil, which is the active ingredient in Cialis. Cialis is Food and Drug Administration (FDA) approved to treat. Promotion disclosure info 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. See all tadalafil cialis prices If you’ve ever looked into getting a medication for erectile dysfunction (ED), you may know that treatment prices can vary.