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.
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Question: The patient is currently under treatment with prednisone 20 mg/day for systemic lupus erythematosus and with oral mesalazine 2.4 mg/day for Crohn's disease.

Answer: non-adverse drug event


Question: Warfarin-associated bleeding generally is considered deleterious; however, in our patient it unmasked an early stage of colon cancer and thus may have saved the patient's life.

Answer: adverse drug event


Question: All patients except two had new recurrences within the observation time.

Answer:
non-adverse drug event