Cenforce 25 is the best way to fight sexual problems like erectile dysfunction. Sildenafil citrate acts as an active ingredient in this drug. This drug slowly loosens the tight muscles and increases the blood flow to the muscles. It also allows blood to flow to a specific area of the body. This medicine lasts for a good 4-6 hours. Tablets should be taken 30-40 minutes before sexual intercourse to get good effect of this medicine.