Cenforce 100 mg is an effective drug that can help you achieve a longer-lasting erection. It is a prescription drug that is available over-the-counter. However, there are some things to keep in mind before taking it. This product should not be taken by males under the age of 18. Alcohol and heavy fatty meals should be avoided as they may slow down the action of the drug. Grapefruit can also interfere with the absorption of the medication, so it is best to avoid these foods when taking the medication.