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: No cases of renal acidosis, and only one case of nephrogenic diabetes insipidus, has been previously reported as a complication of foscarnet treatment.

A: adverse drug event
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Q: The aim of this paper is to report the case of rosaceiform eruption induced by erlotinib in an 81-year-old-man and to discuss the pathogenetic role of Demodex folliculorum mites, found in the present patient, using skin scraping.

A: adverse drug event
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Q: Patients may also experience delirium as part of their underlying medical conditions.

A:
non-adverse drug event
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