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]: Severely elevated serum lithium levels were found.
[EX A]: non-adverse drug event

[EX Q]: Action of intracoronary nitroglycerin in refractory coronary artery spasm.
[EX A]: non-adverse drug event

[EX Q]: CASE REPORT: We present cases of 10 patients with Type 2 diabetes mellitus who developed acute renal failure and severe lactic acidosis.
[EX A]:
non-adverse drug event