Inform your healthcare provider about all medications you are currently taking, especially nitrates, alpha blockers, and medications for high blood pressure. These can interact with Fildena.Fildena 100mg is available in tablet containing 100 milligrams of Sildenafil, which is the active ingredient. The dosage of Fildena 100mg is typically prescribed based on individual health factors and the severity of erectile dysfunction (ED). Here are some dosages: