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.

Q: Paradoxical ventricular tachycardia and fibrillation after intravenous bretylium therapy.

A: adverse drug event
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Q: The reported cases of in utero exposure to cyclosposphamide shared the following manifestations with our patient: growth deficiency, developmental delay, craniosynostosis, blepharophimosis, flat nasal bridge, abnormal ears, and distal limb defects including hypoplastic thumbs and oligodactyly.

A: adverse drug event
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Q: Graves' hyperthyroidism following transient thyrotoxicosis during interferon therapy for chronic hepatitis type C.

A:
adverse drug event
****