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.

Q: Physicians using this "new" drug must be aware of the potential danger of sulfonamide-induced injury to the urinary tract.

A: adverse drug event
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Q: 2-CdA induces lymphocytopenia, which may explain the improvement in this patient's psoriasis.

A: adverse drug event
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Q: A patient is described who developed a poorly differentiated sarcoma after cyclophosphamide was used to treat his rheumatoid arthritis.

A:
adverse drug event
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