Fildena 100 is a popular medication used to treat erectile dysfunction (ED) in men. Its active ingredient, sildenafil citrate, is a phosphodiesterase type 5 (PDE5) inhibitor that works by increasing blood flow to the penis, allowing for an erection in response to sexual stimulation. Fildena 100 is typically taken orally about 30 to 60 minutes before planned sexual activity, with effects lasting up to 4 to 6 hours, enabling spontaneous sexual encounters. Common side effects include headaches, flushing, and dizziness. It is important to consult a healthcare provider before using Fildena 100, especially for those with underlying health conditions or taking other medications.