A case in which a patient who on two occasions developed watery diarrhea and proven collagenous colitis shortly after taking nonsteroidal anti-inflammatory drugs is described. The case report suggests a causal relationship.
Al-Ghamdi, M. Y., Malatjalian, D. A., & van Zanten, S. V. (2002). Causation: Recurrent collagenous colitis following repeated use of NSAIDs. Canadian Journal of Gastroenterology, 16(12), 861–862. https://doi.org/10.1155/2002/245249