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: We followed these patients by A scan ultrasonographic ocular measurements, documenting reduction of the anterior chamber depth combined with lens thickening.
Example Output: non-adverse drug event

Example Input: CONCLUSIONS: The results of our study suggest that the pharmacokinetics of parent ifosfamide may not be substantially altered in patients with renal failure.
Example Output: non-adverse drug event

Example Input: The patient was diagnosed with carbamazepine toxicity related to the introduction of ritonavir.
Example Output:
adverse drug event