Drug exposure research involves studying the ways in which individuals come into contact with and are affected by pharmaceutical drugs. This area of research typically involves examining factors such as the routes of administration, dosages, frequencies, and durations of drug use, as well as potential interactions with other medications or substances. Researchers in this field may use various methods to assess drug exposure, including self-reporting by individuals, medical records, and bioassays. The goal of drug exposure research is to better understand how drugs are used and their impact on individuals' health and well-being.