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.

Progressive interstitial fibrosis with roentgenographic honeycombing developed in the case of a psoriatic patient who had been on a regimen of methotrexate for 18 years.
adverse drug event

INTRODUCTION: Despite high success rates with free-tissue transfer, flap loss continues to be a devastating event.
non-adverse drug event

During this period, urine losses of monovalent cation were only 55 mEq and body weight was constant at 48.2 kg.

non-adverse drug event

