TASK DEFINITION: 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.
PROBLEM: We present the case of a postictal patient with lethargy, hyperammonemia, otherwise normal liver function tests, and a therapeutic valproic acid level.

SOLUTION: adverse drug event

PROBLEM: Bilateral Acanthamoeba keratitis with late recurrence of the infection in a corneal graft: a case report.

SOLUTION: non-adverse drug event

PROBLEM: CASE: A 71-year-old man without immunodeficiency developed corneal endotheliitis in the right eye.

SOLUTION:
non-adverse drug event