Men who have trouble getting an erection take cenforce. Sildenafil Citrate a component in this medication, helps men's penile tissue receive more blood flow and relaxes their muscles. Take this medication half an hour before sexual activity. Males over the age of 18 should be the only ones using this medication. This medication can be used either before or after food. This medication should be taken with water; do not weigh or chew it. Cold beverages or fatty meals should not be consumed with this medication as they will decrease its effectiveness.