Pharmacy compounding is the art and science of preparing customized medications for patients. Its practice dates back to the origins of pharmacy; yet, compounding’s presence throughout the pharmacy profession has changed over the years. In the 1930s and 1940s, approximately 60 percent of all medications were compounded. With the advent of drug manufacturing in the 1950s and 60s, compounding rapidly declined. The pharmacist’s role as a preparer of medications quickly changed to that of a dispenser of manufactured dosage forms. Within the last two decades, though, compounding has experienced a resurgence, as modern technology and innovative techniques and research have allowed more pharmacists to customize medications to meet specific patient needs. Today, an estimated one percent of all prescriptions are compounded daily by pharmacists working closely with physicians and their patients.