ENO COLA FLAVOUR 5GM. Eno gets to work in 6 seconds. A 100 year old global brand, Eno enjoys a presence in more than 40 countries, with India being its second largest market after Brazil. The leading antacid taken for providing instant relief from acidity, gastric discomfort and heart burn, Eno gets you back on track instantly, as it begins to work in six seconds - faster than other tablet and liquid antacids.