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: Hemoglobin electrophoresis and methemoglobin reductase determinations were normal for age.

Answer: non-adverse drug event


Question: Subfulminant hepatitis B after infliximab in Crohn's disease: need for HBV-screening?

Answer:
adverse drug event