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FDA’s Role in Assuring Safe and Effective Drugs
Under the authority of the Federal Food, Drug, and Cosmetic Act and other laws,
the Food and Drug Administration (FDA) ensures that new drugs developed by
pharmaceutical companies are safe and effective and supported by rigorous
scientific research. This typically requires pharmaceutical companies to conduct
extensive pre-clinical and clinical testing spanning 12 to 15 years and costing
upwards of $800 million for each new drug. The FDA-approved drug label distills
this mountain of data into a clear set of instructions that permits physicians
to use the drug product safely and effectively.
Pre-clinical Testing
Before a new drug can be tested in human volunteers (clinical testing), it must
be shown to be reasonably safe in pre-clinical tests. Pre-clinical testing –
which involves testing the drug product in animals – provides an early warning
regarding possible safety risks of a drug product. The FDA reviews the
pre-clinical testing of a new drug and examines the company’s proposed research
plan before allowing trials in humans to begin.
Clinical Studies
Clinical studies – which involve testing a drug product in human volunteers —
are carefully controlled and must follow the pre-set research plan approved by
the FDA. Also, the FDA requires an Investigational Review Board (IRB) composed
of community health care practitioners and lay people to review and approve all
studies involving human subjects. IRBs ensure that the risks to patients are
minimized, that patients’ rights are protected, and that informed consent and
privacy are obtained. Once the trials have started, information gathered from
the study is regularly submitted to the FDA for ongoing review. Controlled
clinical studies are the only legal basis for the FDA to conclude that a new
drug is safe and effective for use.
Drug Approval
After all clinical studies have been completed, the FDA reviews the data and
decides whether the drug can be placed on the market. To be considered for
approval, the following information must be submitted to FDA:
• documentation of the clinical test results;
• the drug’s components;
• results of animal studies;
• how the drug reacts in the body;
• how the drug is manufactured, processed, and packaged;
• drug samples;
• the proposed drug label with complete prescribing information.
Before approving a drug, the FDA makes on-site visits to the investigators
responsible for the clinical studies. The FDA approves the drug if the results
of controlled clinical studies show effectiveness of the drug and that the
product is safe under the conditions of use in the proposed labeling. Once a
drug is approved, the FDA continues to monitor the safety and quality of the
drug by, among other things, requiring drug manufacturers to comply with FDA’s
good manufacturing-practices requirements. The FDA also oversees the promotion
and advertising of prescription drugs. Companies continue their responsibility
by monitoring for safety and promptly reporting serious side effects of the drug
to the FDA.
Importance of Drug Labeling
The drug labeling that accompanies a drug product — also known as the “package
insert” — is the FDA’s approved guidance on how the drug should be used. An FDA
team of physicians, statisticians, chemists, and pharmacologists reviews all of
the submitted data and decides what information should be included in the drug
labeling regarding proper dosage, directions for use, side effects, and
warnings. The FDA-approved package insert distills the mountain of data
submitted to the FDA, including data from all clinical and pre-clinical studies,
into a set of instructions that permits physicians to use the drug product
safely and effectively.
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