Eno Fruit Salt Orange provides fast relief from acidity & gets to work in 6 secs by neutralizing excess stomach acid upon contact. Eno powder gets to work faster than leading liquid and tablet antacids. It provides quick relief from acidity. It works on all the symptoms of acidity, including a sour taste in the mouth, burning in the throat, burning in the chest, stomach discomfort, heaviness, and burning in the stomach.