Importance Of Preclinical Trial Phases In Drug Development

The preclinical studies are done to understand the parallel between the real and the intended biological effect of a drug on an animal, primarily humans in order to predict the level of its efficacy. These trial phases enable the bioscientists to determine adverse events in people and to assess the risks to ensure safety. As the term itself suggests, it includes those phases of the drug designing cycle which are done before clinical trials i.e; testing in humans.

Source: https://integralbiosciences.com/blog/what-is-the-significance-of-preclinical-trial-phases-in-drug-development/