The drug development process starts with identifying a target associated with a disease. This may be DNA or a protein in a biochemical pathway. Drug discovery focuses on finding candidate compounds, or test articles, that bind with the target and may impact the disease. The discovery phase includes animal research to determine if the compound is efficacious and non-toxic. Following the discovery stage of the process, the development phase takes over after locating candidate compounds. Drug development aims to find the best formulations and methods of administering the drug and use clinical trial testing to understand how it works in humans.