Cenforce 120 mg is a prescription medication used to treat erectile dysfunction. It contains Sildenafil Citrate, the same active ingredient found in Viagra. Sildenafil works by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually stimulated. The medication is generally taken 30 to 60 minutes before sexual activity, and its effects can last for 4 to 6 hours. Like all medications, Cenforce 120 mg can cause side effects, including headaches, dizziness, flushing, indigestion, and, in rare cases, vision changes. People with certain pre-existing conditions, such as heart disease or hypertension, should consult their doctor before using this medication.