Men take Cenforce 25 to address sexual problems such as impotence and erectile dysfunction. This medication is only for men over the age of 18. The medicine contains Sildenafil, which increases blood flow to men's penile tissue and relaxes the muscles. Take this medication 30 minutes before sexual intercourse. This medication has a 5-hour duration of action, therefore do not take it regularly. You can take this medication before or after a meal. Take this drug as directed by your doctor.