Cenforce 50 belongs to the class of drugs known as PDE5 inhibitors. It works by relaxing the blood vessels in your penis. An erection can occur when a person is sexually excited, allowing blood to enter the penis. This drug only helps achieve an erection when used in conjunction with sexual stimulation. Despite its great effectiveness, it needs to be taken 30 minutes before having sex. Use of this drug should be avoided if you have low blood pressure, recently suffered a heart attack or stroke, or severe disorders related to your heart or liver. Although everyone's work takes a varied amount of time, it typically takes 30 to 60 minutes.