One can take Zenegra 100mg near about one hour before you plan to have sex. The effects of this medication start in about 30 minutes and go for up to 4 hours, Zenegra online help you in getting an erection if you are sexually aroused or excited. If you consume Zenegra after a high-fat meal then, in that case, the medicine might take a little more time to start its effect. Zenegra helps you in getting an erection when you are sexually excited. You won’t just get an erection by taking this pill.