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.
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Question: Full recovery to pre-episode status of a quiet eye with clear vitreous was seen in all patients.

Answer: non-adverse drug event


Question: A patient developed restless legs symptoms paralleling the course of interferon-alpha (IFN alpha) therapy for chronic hepatitis C.

Answer: adverse drug event


Question: DISCUSSION: Patients with 5-FU-induced ectropion experience tender, red, scaled lids, making contact lens wear difficult.

Answer:
adverse drug event


