For undergraduate courses in Drugs and Behavior Psychopharmacology, as well as graduate survey courses in Psychopharmacology. This text gives an up-to-date description of the field of Behavioral Pharmacology. It starts by describing basic pharmacological concepts of drug administration and pharmacokinetics, research methodology including clinical trials, tolerance and withdrawal, drug conditioning, addiction processes, and neuroscience of drug action. Each chapter, thereafter, applies these concepts to different classes of both recreational and therapeutic drugs. Each chapter includes a section on the history of the drug class that places the drug in its historical and social context. It is written to be understandable to students without a background in Pharmacology or Neuroscience or Psychology.