Cenforce D Extra Power is marketed as a combination treatment for erectile dysfunction (ED) and premature ejaculation (PE). Products sold under this name are commonly associated with sildenafil and dapoxetine, although the exact strengths can vary by formulation. Check the packaging for the active ingredients and doses. Sildenafil can improve erection quality by increasing blood flow to the penis during sexual stimulation. It may help men achieve and maintain an erection when ED is related to insufficient blood flow.