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: MAIN OUTCOME MEASURES: Clinical signs and symptoms of ITB withdrawal of varying severity were assessed by vital signs (temperature, heart rate), physical examination (reflexes, tone, clonus), and patient report of symptoms (itching, nausea, headache, malaise).
Example Output: non-adverse drug event

Example Input: We report four cases of hemodynamically significant pericardial effusion in patients with refractory lymphoma who were receiving gemcitabine, all of whom had a history of mediastinal radiation without subcarinal blocking.
Example Output: adverse drug event

Example Input: No other drugs were detected.
Example Output:
non-adverse drug event