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:
Many new serotonergic antidepressants have been introduced over the past decade.

Ex Output:
non-adverse drug event


Ex Input:
Both the psoriasis and the HCL cleared.

Ex Output:
non-adverse drug event


Ex Input:
OBJECTIVE: To report a case of serotonin syndrome associated with interaction between fentanyl and citalopram, as evidenced by medication history, clinical features and reversal following discontinuation of fentanyl.

Ex Output:

adverse drug event