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.

Antibodies to native or ultraviolet-irradiated DNA were not demonstrated.
non-adverse drug event
The passage describes a patient who developed skin lesions after an exposure to sunlight, which led to the diagnosis of lupus erythematosus. The passage does not mention any adverse drug reaction. Therefore, the answer is non-adverse drug event..