Fildena is primarily used to treat erectile dysfunction (ED) in men. Like any medication, Fildena can cause adverse effects, although not everyone will experience them. Most side effects are mild and temporary, but in some cases, they can be more serious. While Fildena can be highly effective for treating erectile dysfunction, it can cause side effects ranging from mild symptoms to more serious ones. It's important to consult with a healthcare provider before using Fildena to ensure it is safe for you, especially if you have any underlying health conditions or are taking other medications.