Cenforce D is marketed as a combination medicine for men experiencing erectile dysfunction (ED) and premature ejaculation (PE). It commonly contains sildenafil and dapoxetine, although the exact strengths should be confirmed on the product packaging because formulations can vary by market. Sildenafil is a PDE5 inhibitor that increases blood flow to the penis during sexual stimulation, helping support an erection. Dapoxetine is an SSRI-type medicine that affects serotonin signaling and is used in some countries to help delay ejaculation.