Tadagra Prof 20 mg is another brand of tadalafil, similar to Tadagra 20 mg and other tadalafil-containing medications like Cialis. Tadalafil is used primarily to treat erectile dysfunction (ED) and symptoms of benign prostatic hyperplasia (BPH).Tadagra Prof 20 mg contains tadalafil as its active ingredient. Tadalafil works by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually stimulated. It also relaxes the muscles in the prostate and bladder, improving symptoms of BPH.