TASK DEFINITION: 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.
PROBLEM: Endometrial "sarcomas" complicating ovarian thecoma, polycystic ovarian disease and estrogen therapy.

SOLUTION: non-adverse drug event

PROBLEM: Hydroxyzine alone caused an insignificant delay.

SOLUTION: non-adverse drug event

PROBLEM: Severe erythroderma as a complication of continuous epoprostenol therapy.

SOLUTION:
adverse drug event