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.
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Question: Two patients treated with alprazolam had histories suggestive of a bipolar disorder and developed lithium-responsive manic episodes.

Answer: adverse drug event


Question: CONCLUSION: Although a definite association has not been proven, clinicians should be aware of the possibility of agranulocytosis while using quetiapine.

Answer: adverse drug event


Question: Physiologic data were analyzed with an analysis of variance, with the Kruskal-Wallis test used for nonparametric data.

Answer:
non-adverse drug event