Ereva Effervescent Tablet is utilized to treat erectile dysfunction in men. It increases blood flow to the penis to help men get an erection. It works by helping to relax the blood vessels in your penis, allowing blood to flow into your penis when you get sexually excited. Ereva Effervescent Tablet may be taken on an empty stomach or with a meal. It should be strictly taken as advised by your doctor. You should take it about one hour before you plan to have sex. The amount of time it takes to work varies from person to person, but it normally takes between 30 minutes and one hour. This medication will only help you to get an erection if you are sexually stimulated. However, you should not take this medication if you do not have erectile dysfunction. It should not be taken more than once a day. The most common side effects of this medication are flushing, headaches, dizziness, blurred vision, muscle pain, stomach upset, and rash. Talk to your doctor if any of these side effects persist or bother you. They may be able to help you manage the side effects.