Pharmacology is the study of medications, or chemical compounds, which interact with various living systems, from tiny molecules to cells, to tissues and whole organisms in order to produce a certain effect. Every day, more and more new medications are designed to fight diseases, from infections to cancer, heart failure, and depression. But developing a new drug can take a lot of time and money, and it typically consists of three steps. Step 1 is discovery, and that's when a candidate compound is picked out as a possible therapeutic agent for a specific disease. Step 2 is preclinical...