If something can be used as a medicine, it is called a pharmaceutical. Pharmacology includes how drugs are made, how they interact with living organisms, what harmful effects they could have, how they can be used as medicines, and if they can be used to prevent illness. A person who works in the study of pharmacology is called a pharmacologist. Pharmacologists work in a team with biochemists, geneticists, microbiologists, toxicologists and pharmacists to run clinical tests on how drugs work.