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Differentiating Between Lactose Intolerance, Celiac Disease, And Irritable Bowel Syndrome-Diarrhea, Karlen E. (Beth) Luthy, Sophia G. Larimer, Donna S. Freeborn

Faculty Publications

The purpose of this article is to assist nurse practitioners (NPs) and other primary care providers in differentiating between lactose intolerance, celiac disease, and diarrhea-predominant irritable bowel syndrome in adults. Based on subtle characteristics gathered from the history and physical examination, the NP’s examination and approach to testing will help distinguish between the 3 conditions. NPs should use a sequential process of examination and testing to distinguish gastrointestinal disorders that share common symptoms. A best practice algorithm is provided.