If you're curious about the active ingredient in Cenforce 100, you've come to the right place. According to the information on Cenforces.us, the active ingredient in Cenforce 100 is Sildenafil Citrate. It's a well-known and effective medication used to treat erectile dysfunction by helping increase blood flow to certain areas of the body. Always remember to consult a healthcare professional before starting any new medication to ensure it's the right choice for you. Hope this sheds some light on your question!