This is because the active ingredients in Fildena Double 200 Mg—Sildenafil and dapoxetine—work together to enhance intimate experiences and address concerns about premature ejaculation. Both Sildenafil and dapoxetine are PDE5 inhibitors. They work similarly to Viagra but have a faster onset of action, beginning to work in as little as 15 minutes after ingestion. These ingredients increase cGMP levels and promote vasodilation, which increases blood flow to the penis and helps you achieve a firm erection that lasts. This also reduces the chance of premature ejaculation by slowing down the movement of fluid through the urethra.