Fildena Double 200 mg is a medication used to treat erectile dysfunction (ED). It contains the active ingredient Sildenafil Citrate, which is a phosphodiesterase type 5 (PDE5) inhibitor. Fildena Double 200 mg is typically taken orally with water, approximately 30 minutes to 1 hour before sexual activity. Sexual stimulation is necessary for the medication to be effective. The effects of Sildenafil Citrate generally last for about 4 to 6 hours after administration.