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.

Example Input: No explanation for this delay was found, other than the possibility that magnesium sulfate treatment impeded lactogenesis.
Example Output: adverse drug event

Example Input: A 66 year old HIV infected male heavy smoker presented with arthralgia, myalgia, and weight loss which was originally ascribed to nucleoside induced mitochondrial toxicity.
Example Output: non-adverse drug event

Example Input: The our case of patient with von Willebrand's disease type I indicates that this drug is very effective in bleeding after teeth extractions.
Example Output:
non-adverse drug event