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: Progressive anemia following combination therapy with interferon-alpha and interleukin-2 in a patient with metastatic renal cell carcinoma.

A: adverse drug event
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Q: Clinical recovery required an average of 42 days and was complete in four of five patients.

A: non-adverse drug event
****
Q: Three children completely recovered; one patient relapsed and died.

A:
non-adverse drug event
****