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Common Over-the-Counter Medication Masquerading as a Metallic Foreign Body.

A plain film abdominal series performed in the ED showed multiple coin-shaped foreign bodies within the colon. A subsequent abdominal computed tomography scan of the abdomen (Figure 1) confirmed the presence of the objects with a measured electron density of over 3000 Hounsfield units, consistent with metal objects. The radiographic features of the objects were concerning for the possibility of ingestion of coins or lithium-ion batteries. The patient denied any intentional or accidental ingestion of any foreign objects. After appropriate consultative evaluations, the decision was made to observe this patient’s symptoms and to monitor for the passage of the objects in question. Two days after admission, the patient had a bowel movement containing several medicinal tablets, which on questioning where identified by the patient as bismuth subsalicylate tablets he was incorrectly swallowing rather than chewing for symptomatic control of his diarrhea.