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| The Cochran Firm - Dallas

Stimulants like Ritalin could have dangerous effects on the heart, and federal regulators should require manufacturers to provide written guides to patients and place prominent “black box” warnings on drug labels describing these risks, a federal advisory panel voted on Thursday.

“I must say that I have grave concerns about the use of these drugs and grave concerns about the harm they may cause,” said Dr. Steven Nissen, a cardiologist at the Cleveland Clinic and a panel member.

The FDA panel’s recommendation promises to intensify a long-running debate about whether the medicines are overused. Nearly four million patients take the drugs to treat attention deficit disorder and hyperactivity, and committee members said they wanted to slow explosive growth in the drugs’ use.

According to an article in the New York Times, the Food and Drug Administration had convened the panel to help it determine how to research possible heart risks of the drugs. The agency had not asked the committee to address the drugs’ labels, and agency officials seemed taken aback by the votes, saying they would not act on the committee’s recommendations anytime soon.

“We don’t think anything different needs to be done right now,” Dr. Thomas Laughren, director of the Division of Psychiatry Products at the agency, said at a hastily arranged news conference after the meeting. “We think the labeling right now is adequate.”

The committee voted unanimously to recommend patient guides, and it voted 8 to 7 to suggest that stimulant labels carry the most serious of the agency’s drug-risk warnings — a “black box.”

The votes came after FDA medical officers described reports of 25 sudden deaths among people taking stimulants — the deaths were mostly children — and a preliminary analysis of millions of health records that suggested stimulants might increase the risks of strokes and serious arrhythmias in children and adults. The reports of sudden deaths never exceeded one in a million for any stimulant drug, although the F.D.A. usually receives reports of only a fraction of drug problems.

The preliminary analysis suggested that the stimulants might increase heart risks more than twofold. Such an increase may not be significant in children, whose heart risks are low, but could cause concern in adults, panel members said.

One of the drugs, Ritalin, has been marketed since 1955, and dozens of studies have shown it to be safe and effective. But no studies have been of sufficient duration or included enough participants to evaluate stimulants’ long-term effects on the heart.

But the drugs’ soaring popularity and increasing use in adults, panel members said, mean that the F.D.A. should study them more closely and warn patients and doctors about the potential risks to the heart.

Arthur A. Levin, director of the Center for Medical Consumers in New York City and a member of the panel, said that patients assumed that stimulants were safe, but that that confidence was misplaced.

“For us to sit around and talk about it, and for us to not make a very strong warning about the uncertainty of these drugs and their possible risks, would be unethical,” Mr. Levin said.

Dr. Thomas R. Fleming, a professor of biostatistics at the University of Washington and a panel member, said stimulants might be far more dangerous to the heart than Vioxx or Bextra, drugs that were withdrawn over the past two years because of their ill effects on the heart.

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