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: This avoids the need for bronchoscopic examination or transfer of the patient for computed tomography.

Answer: non-adverse drug event


Question: Several case reports of aplastic anemia with use of acetazolamide, and two cases with use of methazolamide, have appeared in the literature.

Answer: adverse drug event


Question: Calcium antagonists are drugs commonly prescribed for the treatment of hypertension, angina pectoris, cardiac arrhythmias and other disorders because of their efficacy and tolerability.

Answer:
non-adverse drug event