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]: Symptomatic air trapped in the spine after lumbar epidural corticosteroid injection.
[A]: non-adverse drug event


[Q]: When a CPS perforates the transverse foramen, even if no apparent VA injury occurs during the operation, the surgeon must take care not to risk cerebral infarction because of an embolism.
[A]: non-adverse drug event


[Q]: Sulfadiazine crystalluria revisited.
[A]:
adverse drug event