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.

Input: Consider Input: We report four cases of hemodynamically significant pericardial effusion in patients with refractory lymphoma who were receiving gemcitabine, all of whom had a history of mediastinal radiation without subcarinal blocking.

Output: adverse drug event


Input: Consider Input: No side effects or drug interactions were observed.

Output: non-adverse drug event


Input: Consider Input: A week prior, the patient was started on folic acid 1 mg orally daily and given an injection of vitamin B12 1000 microg intramuscularly that was continued every 3 cycles thereafter.


Output: non-adverse drug event