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: Here, we describe a case of Vogt-Koyanagi-Harada disease occurring 4 months after the start of interferon alpha treatment, probably induced by the immunomodulatory effects of interferon.
Example Output: adverse drug event

Example Input: Hemoglobin electrophoresis and methemoglobin reductase determinations were normal for age.
Example Output: non-adverse drug event

Example Input: The patient was initially treated for presumed bacterial peritonitis but remained febrile and had persistent abdominal pain and peritoneal fluid pleocytosis, despite broad-spectrum antibiotic therapy.
Example Output:
non-adverse drug event

