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.

Example Input: Two patients treated with alprazolam had histories suggestive of a bipolar disorder and developed lithium-responsive manic episodes.
Example Output: adverse drug event

Example Input: Amphotericin B nephrotoxicity in humans decreased by salt repletion.
Example Output: adverse drug event

Example Input: DESIGN: Description of the clinical findings in two patients with this condition.
Example Output:
non-adverse drug event