The FDA has a complex process for bringing a new drug compound to market – this gives a high level overview of that process from start to finish.
This diagram was created on Dec 28, 2020 12:55 PM and was last updated Mar 8, 2021 9:36 AM.
Drug Development
Drug sponsor develops a new drug compound and seeks to have it approved by FDA for sale in the United States,.
Animals Tested
Sponsor must test new drug on animals for toxicity. Multiple species are used to gather basic information on the safety and efficacy of the compound being investigated / researched.
IND Application
The sponsor submits an Investigational New Drug (IND) application to FDA based on the results from the initial testing that include, the drug's composition and manufacturing, and develops a plan for testing the drug on humans.
(Report)
Investigational New Drug (IND) application for review by the FDA
IND Review
FDA reviews the IND to assure that the proposed studies, generally referred to as clinical trials, do not place human subjects at unreasonable risk of harm. FDA also verifies that there are adequate informed consent and human subject protections.
Clinical Drug Trials
IND application is approved to begin clinical drug trials.
Phase I (20-80 participants)
The typical number of healthy volunteers used in Phase 1; this phase emphasizes safety. The goal here in this phase is to determine what the drug’s most frequent side effects are and, often, how the drug is metabolized and excreted.
Phase II (100's of participants)
The typical number of patients used in Phase 2; this phase emphasizes effectiveness. This goal is to obtain preliminary data on whether the drug works in people who have a certain disease or condition. For controlled trials, patients receiving the drug are compared with similar patients receiving a different treatment—usually a placebo, or a different drug. Safety continues to be evaluated, and short-term side effects are studied.
Phase III Trial Planning
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Phase III (1000's of participants)
The typical number of patients used in Phase 3. These studies gather more information about safety and effectiveness, study different populations and different dosages, and uses the drug in combination with other drugs.
Review Meeting
FDA meets with a drug sponsor prior to submission of a New Drug Application.
NDA Application
The drug sponsor formally asks FDA to approve a drug for marketing in the United States by submitting an NDA. An NDA includes all animal and human data and analyses of the data, as well as information about how the drug behaves in the body and how it is manufactured.
Application Review
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Application Review
After an NDA is received, FDA has 60 days to decide whether to file it so it can be reviewed. If FDA files the NDA, the FDA Review team is assigned to evaluate the sponsor’s research on the drug’s safety and effectiveness.
Drug Labeling
FDA reviews the drug’s professional labeling and assures appropriate information is communicated to health care professionals and consumers.
Facility Inspection
FDA inspects the facilities where the drug will be manufactured.
Drug Approval
FDA reviewers will approve the application or issue a response letter. Note: The Accelerated Approval program allows earlier approval of drugs that treat serious diseases and that fill an unmet medical need. The approval is faster because FDA can base the drug’s effectiveness on a “surrogate endpoint,” such as a blood test or X-ray result, rather than waiting for results from a clinical trial. The Fast Track program helps reduce the time for FDA’s review of products that treat serious or life-threatening diseases and those that have the potential to address an unmet medical need. Drug sponsors can submit portions of an application as the information becomes available (“rolling submission”) instead of having to wait until all information is available.
Post-Approval Risk Assessment System
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Periodic Safety Reports to FDA
Once FDA approves a drug, the post-marketing monitoring stage begins. The sponsor (typically the manufacturer) is required to submit periodic safety updates to FDA.
Drug Distribution Channels
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Reports of Adverse Events
FDA’s MedWatch voluntary system makes it easier for physicians and consumers to report adverse events. Usually, when important new risks are uncovered, the risks are added to the drug’s labeling and the public is informed of the new information through letters, public health advisories, and other education. In some cases, the use of the drug must be substantially limited. And in rare cases, the drug needs to be withdrawn from the market.