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.

About three weeks into the therapy regimen, he complained of severe retrosternal chest oppression.
non-adverse drug event

OBJECTIVE: To report a case of colchicine-induced myopathy in a teenager with familial Mediterranean fever (FMF).
adverse drug event

DISCUSSION: The severity and presentation of central nervous system toxicity due to ifosfamide varies greatly and involves a spectrum ranging from subclinical electroencephalogram changes to coma.

non-adverse drug event

