Fildena 100 is an oral tablet that is used to treat erectile dysfunction in men. This condition is characterized by difficulties in achieving and maintaining an erection. Stress, excessive alcohol consumption, and tobacco smoking can lead to this condition. In addition, there are some people who suffer from pulmonary arterial hypertension, which is elevated blood pressure in the arteries of the lungs. As with any medicine, there are several side effects of Fildena 100, which vary in severity. Taking it with a meal can cause gastrointestinal problems and may lead to flushing.