Tadalista is a prescription medicine mainly used for treating a sexual health disorder called erectile dysfunction or impotence caused in males. Its active ingredient Tadalafil is a PDE5 inhibitor drug that helps to overflow more blood into the penis area and relaxes muscles to maintain a hard erection. This oral medicine is effective for 5 hours until you can enjoy sexual intercourse. Take this drug in a proper way and take your doctor's advice for no more side effects.