Dexlansoprazole is a medicine that is used to treat gastrointestinal problems such as heartburn. It works by diminishing acid that is secreted by your stomach. It eases symptoms of acid reflux, difficulty in swallowing, and dry cough. This medicine can enhance healing of the stomach and throat, prevent peptic ulcers, and prevent cancers of the throat. Dexlansoprazole is a medicine that belongs to a class of drugs that are known as proton pump inhibitors.