Answer: Pharmacokinetics
Explanation:
The interaction between the body and the drug can be studied in two ways. One of them is pahrmakonietics which involves the administration of the drug throughout the body.
It is the study by which how drugs acts on the body and its effects on the body is studied.
The whole pathway is covered in this process in which the drug travels from the oral cavity to the the various parts of the body.
The trace amount of the drugs is also monitored which is found in the urine or cerebrospinal fluid of the body.
