Fildena Super Active belongs to a class of drugs known as PDE5 inhibitors. These drugs work by blocking the action of phosphodiesterase type 5 (PDE5), an enzyme that restricts blood flow to the penis. By inhibiting PDE5, Fildena Super Active helps to relax the blood vessels in the penis, promoting increased blood flow. As a result, it aids in achieving and maintaining an erection in response to sexual stimulation.