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 who developed decreased visual acuity after several months of ethambutol treatment for Mycobacterium avium-intracellulare infection had bitemporal visual field defects that suggested optic chiasm damage.
Example Output: adverse drug event

Example Input: These agents have potent cytotoxic and immunomodulatory effects and are useful in the treatment of a variety of conditions, including inflammatory bowel disease.
Example Output: non-adverse drug event

Example Input: Pneumocystis pneumonia should be considered in asthmatic patients taking methotrexate who present with fever, pulmonary infiltrates, and hypoxia.
Example Output:
adverse drug event