Fildena Double 200 mg tablet contains the chemical sildenafil, which allows men to have an erection for a longer time. This sildenafil component promotes the relaxation of men's penile tissues. This drug works best when taken 30 minutes or an hour before intercourse. This drug has a 4- to 6-hour effect. Fildena Double 200 can be taken either before or after meals. Take this medication exactly as directed by your doctor.