How Effective Is Cialis? Tadalafil is a type of drug used to increase blood flow to the sex organ of males. The average cost of Cialis within 2. Tadalafil is its active ingredient and is available as a generic drug. Average Cost of Cialis The different dosages of the drug affect the cost of the treatment. What Is Cialis?Efficacy of continuous dosing of Tadalafil once daily vs. Tadalafil on demand in clinical subgroups of men with erectile dysfunction: A descriptive comparison using the integrated Tadalafil. VAT 20%: $. Total: $. Contact. After taking a single tablet, some of the active ingredient of Cialis remains in your body for more than 2 days. Cialis is a brand of tadalafil, one of the most popular medications to treat erectile dysfunction (ED).It was first approved in . AdGet Deals and Low Prices On pharmacy prescriptions At Amazon. Enjoy Great Deals and Discounts On an Array Of Products From Various Brands.