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.

Ex Input:
Bilateral computerized tomography showed no progression in radiographic changes during the treatment.

Ex Output:
non-adverse drug event


Ex Input:
None of these patients experienced a relapse of their PTLD with follow-up ranging from 1.5 to 5 years.

Ex Output:
non-adverse drug event


Ex Input:
Overnight sleep studies and multiple sleep latency testing were carried out under double-blind administration of either L-dopa or placebo.

Ex Output:

non-adverse drug event