Fildena 100 purple uses sildenafil citrate as the main and active salt composition. Sildenafil citrate is an FDA approved and medically tested drug known for its promising results and practical solution. Unlike other erectile dysfunction medications, Fildena 100 mg acts on the main problem, which is blood supply, and ensures that the problem is treated at the root without making you dependent on the medication. When this blood supply is interrupted, you start facing the problem of erectile dysfunction.