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.

She developed a pre-engraftment immune reaction, which responded well to prednisolone, and engraftment was documented.
non-adverse drug event
The medical case report is about a patient who developed a pre-engraftment immune reaction. The report mentions that the patient's reaction responded well to prednisone and engraftment was documented. There is no mention of adverse drug reactions or anything that would be considered an adverse event, so the answer is non-adverse drug event..