Adverse drug reactions are appreciably harmful or unpleasant reactions resulting from an intervention related to the use of medical products, which predicts hazard from future administration and warrants prevention or specific treatment, or alteration of the dosage regimen, or withdrawal of the product. Given medical case reports extracted from MEDLINE, the task is to classify whether the case report mentions the presence of any adverse drug reaction. Classify your answers into non-adverse drug event and adverse drug event.
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Question: Imatinib mesylate therapy in patients with gastrointestinal stromal tumors and impaired liver function.

Answer: non-adverse drug event


Question: A 25-year-old man with a history of mid-borderline (BB) Hansen's disease developing a reversal reaction after starting dapsone and rifampin therapy is presented.

Answer: adverse drug event


Question: METHODS: A retrospective report of the first case of gemcitabine-related HUS, in a patient with metastatic pancreatic adenocarcinoma, treated with a variety of standard therapies in addition to rituximab is presented.

Answer:
adverse drug event