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]: Psoriasis-like skin reaction in a patient with rheumatoid arthritis after sulphasalazine therapy.
[EX A]: adverse drug event

[EX Q]: Adriamycin-induced cardiomyopathy aggravated by cis-platinum nephrotoxicity requiring dialysis.
[EX A]: adverse drug event

[EX Q]: PURPOSE: We studied a case of vortex keratopathy that was associated with the use of atovaquone.
[EX A]:
adverse drug event