The initial phase of drug testing before human trials is called what?

• A. In Vitro Studies
• B. Preclinical Trials
• C. Animal Studies
• D. Laboratory Testing

Answer: (C)

The initial phase before testing in people is preclinical testing. This stage is all about assessing safety and biological activity using nonhuman systems, including cell-based (in vitro) studies and animal studies (in vivo). The umbrella term preclinical trials best captures the whole nonhuman testing phase, covering pharmacology, toxicology, and dosing data that are essential before any human trials can begin. Animal studies are a crucial part of this phase, but naming the whole phase as preclinical trials is more accurate than focusing on a single element like animal work. In vitro studies are also part of this process, helping screen and refine before moving to animal testing, but they don’t alone define the entire initial phase.