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.

[EX Q]: RESULTS: Evidence of neurological improvement and rehabilitation potential after severe myelopathy due to intrathecal injection of doxorubicin.
[EX A]: adverse drug event

[EX Q]: A patient developed restless legs symptoms paralleling the course of interferon-alpha (IFN alpha) therapy for chronic hepatitis C.
[EX A]: adverse drug event

[EX Q]: This was accepted as evidence for propranolol being the cause of this conduction disorder.
[EX A]:
adverse drug event