Cenforce 100 contains sildenafil citrate, a medicine used for erectile dysfunction (ED) in adult men. ED may involve difficulty getting an erection or keeping it firm enough for sexual activity. Sildenafil works by supporting blood flow to the penis during sexual stimulation. It does not increase sexual desire, cause an automatic erection, or work without arousal. The right dose depends on individual health, current medicines, and treatment response, so a 100 mg tablet is not suitable for everyone.