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]: Because of its favorable tolerability profile it appears to be a preferred alternative, especially in NSAID-sensitive patients.
[EX A]: non-adverse drug event

[EX Q]: Primary CNS lymphoma regressed on withdrawal of MM.
[EX A]: adverse drug event

[EX Q]: There is no consensus on the treatment of ticlopidine-induced marrow aplasia.
[EX A]:
adverse drug event

