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Filitra 20 mg is a prescription medication used to treat erectile dysfunction (ED) in men. Its active ingredient is Vardenafil, a phosphodiesterase type-5 (PDE-5) inhibitor. Vardenafil works by relaxing the blood vessels in the penis, increasing blood flow during sexual arousal, which helps men achieve and maintain a firm erection. The 20 mg dose is considered a higher on-demand strength and is typically prescribed for men who do not respond adequately to lower doses such as 5 mg or 10 mg. It is usually taken 30–60 minutes before sexual activity, and its effects can last up to 4–6 hours, depending on individual metabolism and health conditions.