Updated on November 7, 2024 Laryngopharyngeal Reflux (LPR) Laryngopharyngeal refulx (LPR), also known as the silent reflux (no belching or vomiting), is the retrograde flow of gastric contents into the larynx and pharynx (nasopharynx, oropharynx and laryngopharynx). The effect of gastric acid on the larynx and pharynx causes and inflammatory response and a litany of...