Buck(noun) the male of deer, especially fallow deer and antelopes, or of goats, sheep, hares, and rabbits. Buck(noun) a gay, dashing young fellow; a fop; a dandy. Buck(noun) a male Indian or negro. Buck(verb) to copulate, as bucks and does.
The idea. The idea for a clinical research study â also known as a clinical trial â often originates in the laboratory. After researchers test new therapies or procedures in the laboratory and in animal studies, the most promising experimental treatments are moved into clinical trials, which are conducted in phases.
Medical research studies involving people are called clinical trials. They are divided into different stages, called phases. The earliest phase trials may look at whether a drug is safe or the side effects it causes. A later phase trial aims to test whether a new treatment is better than existing treatments. We have more information about the phases of trials.