instruction:
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.
question:
A reduction of up to 33 percent in pituitary tumor size has been reported in more than half of the 27 cases studied from four groups.
answer:
non-adverse drug event


question:
Imatinib mesylate therapy in patients with gastrointestinal stromal tumors and impaired liver function.
answer:
non-adverse drug event


question:
Metronidazole neuropathy.
answer:

adverse drug event