Cenforce 120 taking the Cenforce p*ll, read the medical record insert issued by your pharmacist each time you get a refill. If you have any problems, ask your doctor or pharmacist. To treat erectile dysfunction, take Cenforce 120 by mouth as directed by your doctor. Cenforce should be taken at least 30 minutes but no more than 4 hours before any s*xual activity. For best results 1 hour before is the most effective. Do not take more than once a day.