Final answer:
The subject of this question is Medicine and the question involves a clinical study evaluating the pharmacokinetics of zolpidem in elderly subjects.
Step-by-step explanation:
The subject of this question is Medicine. The question involves a clinical study evaluating the pharmacokinetics of zolpidem in elderly subjects. Pharmacokinetics refers to the study of how drugs are absorbed, distributed, metabolized, and excreted by the body.