The way that Cenforce 100 mg pills functions is by calming the tissues around the male genitalia. There are very few adverse effects and the entire working mechanism is natural. Sildenafil increases blood flow to the penis and reduces tension in the area surrounding the pelvic organs. After using this impotence medication for 30 to 40 minutes, harder erections occur as the penis continues to receive blood. Men who take one 100 mg pill of Cenforce are guaranteed four to five hours of intense sexual activity.