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.

Q: RESULTS: Seven patients showed marked visual field constriction with some sparing of the temporal visual field.

A: non-adverse drug event
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Q: Lithium-induced Creutzfeldt-Jakob syndrome.

A: adverse drug event
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Q: This report highlights a case of drug-induced dysphagia in a patient receiving haloperidol for obsessive nocturnal thoughts and auditory disturbances.

A:
adverse drug event
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