Cenforce 25 drug is an effective treatment for erectile dysfunction [ED] or impotence problems in men. The active ingredient sildenafil citrate plays an important role in this drug, which relaxes the muscles and helps increase blood flow to the penis. It is most effective if taken one hour before sexual activity. The effectiveness of one dose lasts for 4-5 hours and should be taken once a day. It is imperative to consult a doctor before taking this medicine.