Satisfaction during intercourse is very important and a solid erection is very important for satisfaction and adequate blood flow to the penis is necessary for a solid erection. Increased blood flow to the penis is possible with the ingredient sildenafil citrate and this ingredient is found in cenforce pills. All men can make their penis hard for 4-6 hours only with the help of an ingredient called sildenafil, a member of the group of PDE-5 inhibitors.