Filagra is a well-known medication used to treat erectile dysfunction (ED), helping men achieve and maintain a firm erection during sexual activity. The primary active ingredient in Filagra is Sildenafil Citrate, the same compound found in Viagra, which works by increasing blood flow to the penis by relaxing the blood vessels. This improved circulation helps men respond more naturally to sexual stimulation. Filagra comes in several variants, including Filagra 100 mg, Filagra Double, and Filagra DXT, providing options based on individual needs and severity of ED. Typically taken 30 to 60 minutes before sexual activity, its effects can last for up to 4 to 6 hours.