Tadalista contains tadalafil, the active ingredient also found in the well-known brand Cialis. It works by relaxing the blood vessels and increasing blood flow to specific areas of the body, most notably the penis, to help achieve and maintain an erection. Tadalista is commonly prescribed for erectile dysfunction, benign prostatic hyperplasia (BPH), and sometimes pulmonary arterial hypertension. Dosages vary depending on whether it’s taken as needed or daily. For ED, doses typically range from 5 mg (daily use) to 10 or 20 mg (on-demand use).