Fildena 100 mg is a prescription medication used to treat erectile dysfunction (ED) in men. It contains 100 mg of Sildenafil Citrate, the same active ingredient as in Viagra. Fildena 100 helps increase blood flow to the penis, enabling a firm erection when sexually aroused. It should be taken about 30–60 minutes before sexual activity, and its effects can last up to 4–6 hours. Only one dose is recommended per day.