Adenoscan contains adenosine, but used as a coronary vasodilator exclusively for diagnostic purposes in conjunction with radiopharmaceuticals for myocardial perfusion imaging. So should it be a drug or a device?
The only standard vocabulary items for Adenoscan are all in the “Drug” domain. Are you asking if these concepts should be reassigned to a different domain?
I would argue that they should stay where they are. DEVICE_EXPOSURE is for “a foreign physical object or instrument which is used for diagnostic or therapeutic purposes through a mechanism beyond chemical action.” In this case, the drug is used for diagnostic purposes through a mechanism that is not beyond chemical action, unless I’m mistaken.