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: He was taken to the emergency department and given intravenous methylprednisolone sodium succinate and intravenous diphenhydramine hydrochloride.

Answer: non-adverse drug event


Question: Ulcer became worse after tobramycin and gentamycin treatment for 2 days.

Answer: adverse drug event


Question: Although the data indicate an immune-complex cause for gold-salt nephropathy, the incident antigen (or antigens) and mechanism of action remain unidentified.

Answer:
adverse drug event