Reactive gastropathy, chemical gastropathy also called gastritis of « C type » or "chemical gastritis"[1] is an abnormality in the stomach caused by chemicals, e.g. bile, alcohol, and characteristically has minimal inflammation.

Reactive gastropathy has a large number of causes, including: The diagnosis is by examination of tissue, e.g. a stomach biopsy.

Reactive gastropathy is morphologically distinct entity[3][4] that can be separated from gastritis, which by definition has a significant inflammatory component.

As a reactive gastropathy may mimic a (true) gastritis symptomatically and visually in an endoscopic examination, it may incorrectly be referred to as a gastritis.

Even aware of the underlying etiology of the pathologic process, e.g. NSAID use, the label "chemical gastritis" is applied to a chemical gastropathy.