Cenforce 120 is a PDE5 class inhibitor and FDA approved drug as a treatment for oral erectile dysfunction manufactured by Centurion Laboratories. Cenforce has 120mg of sildenafil citrate as its main active ingredient and hence the name Cenforce-120.Cenforce-120 shows its effectiveness within 15-30 minutes after ingestion, provided that the patient is s*xually stimulated. Patients only need to take one tablet in 24 hours with a glass of water. Drinking alcohol or grapefruit juice should be avoided to get the drug in faster. It is best to eat something before taking this medicine.