Cenforce 200 mg is used to treat men with erectile problems. It contains sildenafil, the same active ingredient as the popular ED drug Viagra. It works by relaxing blood vessels in the penis. This allows for an increased blood flow, which results in an erection. You can buy it online at various retailers in 200mg tablets. Cenforce 200 is only to be taken one time per day and at least 30 minutes prior to sexual activity.