Erectile dysfunction, also known as impotence, erectile dysfunction is the inability to develop or maintain a penile erection suitable for sexual activity. Cenforce 50 works by increasing blood flow to the penis. This helps you get or maintain an erection. Sildenafil only works for ED if you are sexually aroused. You can take this medicine before or after food. Take this medicine with water but do not break or chew the medicine. Take this medicine 30 minutes before intercourse. This medicine is only taken by men above 18 years of age.