One of the most effective oral drugs for treating male erectile dysfunction (ED) is fildena double 200. Fildena 200, which is produced by Fortune Healthcare, has a high dosage of sildenafil citrate (200 mg), which is the same active component as in Viagra. The purpose of this maximum-strength formulation is to help men who have not responded well to smaller doses, such 50 mg or 100 mg. Fildena 200 improves blood flow to the penile tissues during sexual stimulation by blocking the phosphodiesterase type 5 (PDE5) enzyme, resulting in a harder and more durable erection.