Pharmacology is a biomedical science that studies how and where in the body drugs act to produce their effects, from the whole organism down to its individual cells. Most drugs produce their effects by interacting with particular molecular components within cells. Pharmacology also considers the body's handling of drugs - how drugs are administered and absorbed, how they distribute within the body, and how they are eventually inactivated and/or excreted, often after being modified in chemical structure by the action of enzymes found in the body.
Neuroscience is the study of the functioning of the nervous system, both in health and disease, ranging from understanding the molecular, biochemical and cellular events that underpin communication between nerve cells through to the execution of complex behaviours. Higher cognitive functions ultimately depend upon cellular and neuronal networks that neuroscience endeavours to reveal and explain. The discipline grows in importance to society as the population ages, bringing new challenges in the treatment and management of neurological disorders.