Acidity can be associated with a range of issues like stomach discomfort, bloating,pain, acid reflux, and heartburn. ENO - Gets to Work in 6 Seconds! Thankfully, relief from acidity can arrive fast with ENO. Based on lab studies, ENO powder gets to work faster than leading liquid and tablet antacids. In fact ENO gets to work in just 6 seconds. Nothing is better for fast acidity and heartburn relief than ENO.