Tadagra Prof 20 mg relaxes blood vessel muscles and improves blood flow to specific parts of the body. Cialis is a brand name for Tadagra Prof 20 mg, which is intended to treat erectile dysfunction (ED) and the symptoms of benign prostatic hypertrophy (enlarged prostate). Tadagra Prof 20 mg tablets are used in the treatment of Erectile dysfunction, a problem in which men are unable to attain long and hard erections during sexual intercourse.