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For drug development, the clinical phases start with testing for drug safety in a few human subjects, then expand to many study participants (potentially tens of thousands) to determine if the treatment is effective. [1] Clinical research is conducted on drug candidates, vaccine candidates, new medical devices, and new diagnostic assays.
Following preclinical research, clinical trials involving new drugs are commonly classified into four phases. [ 1 ] [ 3 ] [ 8 ] Each phase of the drug approval process is treated as a separate clinical trial .
Drug development is the process of bringing a new pharmaceutical drug to the market once a lead compound has been identified through the process of drug discovery.It includes preclinical research on microorganisms and animals, filing for regulatory status, such as via the United States Food and Drug Administration for an investigational new drug to initiate clinical trials on humans, and may ...
The drug pipeline is also sometimes restricted to a particular drug class or extended to mean the process of discovering drugs (the research and development pipeline). [3] The R&D pipeline involves various phases that can broadly be grouped in 4 stages: discovery, pre-clinical, clinical trials and marketing (or post-approval).
National Cancer Institute video on the phases of clinical trials. Clinical trials involving new drugs are commonly classified into five phases. Each phase of the drug approval process is treated as a separate clinical trial. The drug development process will normally proceed through phases I–IV over many years, frequently involving a decade or
Drug development – the process of taking a new chemical through the stages necessary to allow testing in clinical trials; Biotechnology – the technological application that uses biological systems, living organisms to make or modify products or processes for specific use Biopharmaceutical – a drug produced using biotechnology
In drug development, preclinical development (also termed preclinical studies or nonclinical studies) is a stage of research that begins before clinical trials (testing in humans) and during which important feasibility, iterative testing and drug safety data are collected, typically in laboratory animals.
Phase refers to the four phases of clinical research and development: I – small safety trials early on in a drug's development; II – medium-sized trials for both safety and efficacy; III – large trials, which includes key (or so-called "pivotal") trials; IV – large, post-marketing trials, typically for safety reasons. There are also ...
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