Emazole Control Esomeprazole is a short term treatment for reflux symptoms such as heartburn and acid regurgitation. Reflux causes your gullet (food pipe) to become inflamed and painful. Symptoms may cause a painful sensation in the chest rising up to your throat or may also give you a sour taste in the mouth. Emazole Control works by reducing the amount of acid that your stomach produces for at least 24hours. Emazole does not offer immediate result and it may take 2-3 days in a row before you feel better.