The principle of operation of Fildena 150 is the same as that of any other drug in the group. It works by blocking or controlling the level of PDE-5 in the human body. Once its state is maintained, the production of the cGMP enzyme improves. This cGMP speeds up communication between the penis and the brain. So when you feel erotic, the brain receives the signal and increases blood flow in the veins and arteries of the penis. Thanks to this, the person had a long and firm erection, which helped them have better sexual relations. Fildena 150 mg also causes a relaxing effect on the penis; This helps remove any blockages and creates an open path for blood flow.