instruction:
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:
In all the patients, pellagra symptoms appeared during isoniazid therapy.
answer:
adverse drug event


question:
Considerable improvement of myasthenic symptoms was seen in all patients within 3-6 months after the initiation of this therapy.
answer:
non-adverse drug event


question:
We describe a patient with transitional cell carcinoma of the renal pelvis who developed respiratory dysfunction and an abnormal chest x-ray with diffuse interstitial opacities while on chemotherapy with piritrexim, a methotrexate analog.
answer:

adverse drug event