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]: Septic knee arthritis after intra-articular hyaluronate injection.
[EX A]: adverse drug event

[EX Q]: This case and a review of the literature show the severe and unpredictable nature of ethambutol toxicity and its potential for irreversible vision loss despite careful ophthalmologic monitoring.
[EX A]: adverse drug event

[EX Q]: We report two cases of cerebrospinal fluid eosinophilia (CSFE) secondary to the intraventricular administration of vancomycin.
[EX A]:
adverse drug event