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DRUG
LABELING
FDA Told to
Delay ADHD Drug Labeling Changes
An advisory committee told FDA officials Thursday that it was hesitant
to recommend a drug labeling change for a class of stimulants used
to treat attention-deficit hyperactivity disorder (ADHD).
A release posted
on the drug agency's Web site noted that members of the Pediatric
Advisory Committee, in a meeting Thursday, did not come across any
new concerns about psychiatric side effects with Concerta and other
methylphenidates, which include Ritalin and Metadate. They also
suggested that the FDA wait until more safety data has been collected
on two other types of drugs used to treat ADHD -- methamphetamines
such as Adderall and the non-stimulant Strattera.
The FDA should
"delay the drug labeling change until they have a good sense
of class effect," Acting Committee Chairman Robert Nelson,
of The Children's Hospital of Philadelphia, told FDA officials during
the committee meeting, which was convened by the agency.
"We heard
there is no terrible signal," Office of Pediatric Therapeutics
Director Dianne Murphy said in the release.
"None of
what I have heard today about these medications has made me particularly
concerned," committee member Thomas Newman, of the University
of California-San Francisco, said in the release.
The FDA was
considering drug labeling changes to all methylphenidates with regard
to psychiatric events and potential cardiovascular side effects.
A review had found 36 psychiatric events for Concerta, compared
to 16 for Ritalin and other methylphenidates. Concerta had 20 cardiovascular
event reports, while the other methylphenidates had four such reports.
Despite the committee's advice, Murphy said the agency still may
change drug labeling about psychiatric side effects to "try
to make it clearer what the situation is with regard to certain
adverse events."
The FDA's decision
to take a closer look at these medications has not surprised some
experts.
"These types of issues theoretically were possible with the
medication because of the way it works. It's not surprising that
they've had some reports that relate to psychiatric side effects..."
said Dr. Lenard Adler, director of the Adult ADHD Program at New
York University Medical Center. "My interpretation is that
they're going to look at this, and at how often it's happening."
The drugs have been around for 40 years, she added, and have a "wide
margin of safety."
"Any medicine that has therapeutic effect can have some side
effects," Adler continued. "This is appropriate scrutiny
by the FDA, but the benefits are also very clear and clearly outweigh
the risks."
Another expert
believes drug labeling changes may not be the answer.
"Drug labeling
is an oversimplification of the problem," said Dr. Eugenio
M. Rothe, director of the child and adolescent psychiatry clinic
at Jackson Memorial Hospital and an associate professor of psychiatry
at the University of Miami School of Medicine. "It scares people,
and it doesn't address the other problems that are affecting the
outcome. The problem is much more complex than that, and has to
do primarily with the stigma associated with mental health conditions."
This is just
the latest chapter in the ongoing debate over the safety of ADHD
medications.
In February, Health Canada ordered Adderall XR off the market, after
reports of sudden cardiac death in 20 patients.
The FDA, however,
elected only to require the company to update Adderall's label to
warn that it should not be used in anyone with structural cardiac
abnormalities.
"The FDA
is pursuing additional means to better characterize the cardiovascular
risks for all drug products approved for ADHD," it said in
a statement.
Other ADHD drugs
would also be scrutinized for psychiatric adverse events, the statement
said. That review of amphetamine products and Strattera won't be
brought to the advisory committee's attention until early 2006.
The FDA stressed
in its statement that it did not want to steer doctors and patients
from one class of ADHD drugs with possible side effects to another
class of ADHD drugs for which there is incomplete safety data.
Almost 2 million
children in the United States have been diagnosed with ADHD, according
to the National Institute of Mental Health.

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