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: Spironolactone was continued, as serum creatinine and potassium levels were initially normal.
Example Output: non-adverse drug event

Example Input: Because of its favorable tolerability profile it appears to be a preferred alternative, especially in NSAID-sensitive patients.
Example Output: non-adverse drug event

Example Input: There is potential for this side effect, and additional caution in the use of this drug should be followed.
Example Output:
non-adverse drug event

