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: The events of non-convulsive status epilepticus subsided following reduction in tiagabine dosages.
Example Output: adverse drug event

Example Input: Pravastatin is associated with myotonia in animals.
Example Output: adverse drug event

Example Input: Patients were followed with sequential ocular examinations for a maximum of 36 weeks.
Example Output:
non-adverse drug event