Tadalafil in the treatment of erectile dysfunction. Therapeutics and clinical risk management, 4 6 , — Some over-the-counter ED drugs come with serious health risks. Some over-the-counter ED drugs come with serious health risks. They may contain hidden active ingredients or simply not work. You can get Cialis with an online medical consultation.Generic Cialis, or Tadalafil, is available in several doses in tablet form: milligrams (mg), 5 mg, 10 mg, and 20 mg. Depending on the dose for ED, you can use it as needed before sexual. stability quality Usually, generic drugs aren’t available until the expiration of the brand name’s patent. Eli Lilly and Company’s patent for Cialis expired in , opening the market to generic. $ medication_outlined Availability Available See GoodRx coupons warning Are you looking for information on Adcirca (tadalafil) instead? What is Tadalafil (Cialis)? Drug Facts Common Brands Cialis Drug Class PDE-5 inhibitor Controlled Substance Classification Not a controlled medication Generic Status No lower-cost .