Cenforce is produced in USA by Centurion Laboratories and exported globally as a generic version of Viagra. It comes in several strengths including Cenforce 100, Cenforce 150, and Cenforce 200 which contain 100mg, 150mg, and 200mg doses of sildenafil citrate respectively. The active ingredient sildenafil helps relax blood vessels and improves blood flow to aid in treating erectile dysfunction.