Cenforce FM is another name for generic women’s Viagra. It contains 100mg of sildenafil citrate, the active ingredient. In addition to treating male erectile dysfunction, the drug sildenafil citrate is also used to treat women’s sensual dysfunction. It works by increasing blood flow to the genital area of the body. Cenforce FM 100mg lasts for 5 to 6 hours and needs to be taken one tablet one hour before engaging in physical activity.