Acidic spicy and fatty food as well as caffeine beverages alcohol and dairy products can cause frequent heartburn. Those who deal with it understand the uncomfortable burning sensation in the lower chest or throat. Heartburn occurs when acid from your stomach moves up irritating the sensitive lining of the esophagus (the tube that transports liquids and foods from the throat to the stomach). Normally the lower esophageal sphincter acts like a trapdoor allowing food down into the stomach. When it becomes too relaxed it allows acid to back up into the esophagus causing an uncomfortable sensation in the lower chest or throat.

Compare to the active ingredient of Zantac 150
Maximum Strength
Acid Reducer
One tablet prevents and relieves: heartburn Associated with Acid Indigestion and Sour Stomach
Prevents heartburn associated with acid indigestion and sour stomach brought on by certain foods and beverages

Active ingredient: Ranitidine 150 mg (as ranitidine hydrochloride 168 mg.
Inactive Ingredients: DandC yellow #10 aluminum lake FDandC blue #2 aluminum lake FDandC red #40 aluminum lake hypromellose magnesium stearate microcrystalline cellulose titanium dioxide triacetin.