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: Primary CNS lymphoma regressed on withdrawal of MM.

Answer: adverse drug event


Question: Hypersensitivity reactions involving the kidneys can occur with any of the penicillin groups.

Answer: non-adverse drug event


Question: The patient was regularly taking a mixture of herbal products, used as a laxative, for a number of years, with no alteration of blood chemistry until 6 months before the present observation.

Answer:
non-adverse drug event