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

Answer: adverse drug event


Question: The first was a 56-year-old male treated with multiple chemotherapeutics for multiple myeloma.

Answer: non-adverse drug event


Question: The patient did well after the operation and returned to normal activity.

Answer:
non-adverse drug event


