The U.S. Food and Drug Administration (FDA) issued three final
guidance documents this month relating to drug safety and risk management. The
three guidances, entitled "Premarketing Risk Assessment," "Development
and Use of Risk Minimization Action Plans," and "Good Pharmacovigilance
Practices and Pharmacoepidemiologic Assessment," address various stages
of product development from early clinical development stages to post approval,
all with recommendations for preventative measures to reduce the chance of an
unforeseen risk making its way to the public.
"These are complementary documents that have been carefully crafted and
extensively vetted in the public," said Paul Seligman, MD, MPH, director,
Office of Pharmacoepidemiology and Statistical Science, Center for Drug Evaluation
and Research, FDA, in a press conference. "They are based on years of FDA
experience and provide recommendations to the industry to optimize the very
important safety information coming out of late-stage drug development, as well
as the safety information gathered once a product is marketed."
When asked about what specific effects the documents will have
on the drug approval process and if having these guidances in place at the time
of the Vioxx approval would have resulted in a different outcome, Seligman offered
a general response. "Many of the principles that are articulated in terms
of the size of a safety study, and the pre-market safety evaluation testing
that should be done, are very much drug-specific, as well as whether or not
a risk management plan should be applied, and the need for additional scrutiny
in the post-marketing environment."
"We do believe very strongly that improving risk and safety assessment
will improve our collective ability to assess and anticipate safety concerns.
We also recognize that improving this assessment is not a guarantee that we
will be able to completely avoid problems in the future," he said. In the
case of Vioxx, it was not a question of the detection of cardiovascular risks;
it was really a question of how the data should be interpreted, how to weigh
evolving information on the benefits and risks in determining whether or how
widespread a product should be made available."
The development and use of risk minimization action plans or RiskMAPs is an
approach that has never been previously defined or articulated by the FDA, Seligman
said. The term RiskMAP is defined in the guidance as meaning, "a strategic
safety program designed to meet specific goals and objectives in minimizing
known risks of a product while preserving its benefits. A RiskMAP targets one
or more safety-related health outcomes or goals and uses one or more tools to
achieve those goals."
An example of a stated goal, as stated in the guidance, could
be "…patients on X drug should not also be prescribed Y drug"
or "fetal exposures to Z drug should not occur." Then the guidance
says that such goals, "be translated into pragmatic, specific, and measurable
program objectives that result in processes or behaviors leading to achievement
of the RiskMAP goals." It then states: "The objectives could include
lowering physician co-prescribing rates and/or pharmacist co-dispensing rates."
Will such proposed self-supervising by drug makers slow the
approval process? "The development of a RiskMAP is not a condition of approval
and does not change the criteria on which we base approval decisions,"
Seligman said.
What the real-world implications of the recommendations made in the new guidances
will be is difficult to determine, but the goal, Seligman said, is to get the
industry to more thoroughly scrutinize the safety of its products. "What
we are really trying to do in these documents is make sure that people think
about, anticipate, and try to deal with as many of these safety concerns as
early in the product development as possible so that there aren't surprises
toward the end of development that could potentially delay a product's approval."