Cenforce 100mg is commonly used to treat erectile dysfunction (ED) in men. Cenforce 100mg improves the ability to achieve and maintain an erection by enhancing blood flow, but it does not cause an erection without sexual arousal. The drug helps men with ED perform better during sexual activity. Cenforce 100mg should not be taken more than once a day. The effects of the medication typically last for about 4 to 6 hours. A painful and prolonged erection lasting more than 4 hours. If this occurs, medical attention is needed immediately to prevent permanent damage.