Drugs are ubiquitous in our society. An understanding of drug action is especially important for those who plan to enter the health-care profession. As part of your education, you need to learn how to research the drugs you will encounter. For this assignment you must research a drug, either legal or illegal, prescription or nonprescription from a minimum of three sources. The drug you choose must either be a chemical messenger or in some way influence the action of a chemical messenger. Please check with Professor Chaney before doing your research so you know you have selected something appropriate (for example, antibiotics will not work for this assignment).