This answer is simple if you don't plan on managing chronic pain, an unlikely direction for allergy or immunology. But, if you see yourself prescribing controlled substances occasionally for special situations, or if you simply are philosophically opposed to practicing with a blanket constraint, your interviewer will want to know. The opioid crisis makes for bad press from overdoses, and institutions and groups want to steer clear of the whole controversy--not to mention scrutiny from the DEA and your state board. Before your interview, prepare your response to demonstrate you are aware of the special precautions needed when prescribing schedule drugs.