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: Medical management of the head and neck cancer patient (HNCP) most often will include radiation therapy to the head and neck region.
Example Output: non-adverse drug event

Example Input: Two patients are described who developed sensory neuropathy after the ingestion of 30.6 and 114 g metronidazole respectively.
Example Output: adverse drug event

Example Input: Antibodies to native or ultraviolet-irradiated DNA were not demonstrated.
Example Output:
non-adverse drug event