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: On postoperative day 17, she demonstrated hyperkalaemia and metabolic acidosis; she was diagnosed to have hyperkalaemic distal RTA with aldosterone deficiency (type IV).

A: non-adverse drug event
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Q: Hydroxyzine alone caused an insignificant delay.

A: non-adverse drug event
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Q: Benzoyl peroxide (BP) is commonly used for topical acne treatment and has long been known to be a weak allergen and a strong irritant.

A:
non-adverse drug event
****