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.
--------
Question: Post-steroid septic arthritis can be treated with irrigation pump assisted arthroscopic synovectomy.

Answer: non-adverse drug event


Question: Depressive symptoms disappeared after interferon therapy was stopped.

Answer: adverse drug event


Question: This report emphasizes the unnecessary hazard accompanying use of a potentially toxic drug-especially when prepared in error by the pharmacist-when a safer drug (nystatin) is available for treatment of oral candidiasis.

Answer:
non-adverse drug event