The 'Mood Swings'

"WASHINGTON, 2007 (UPI) -- The U.S. Food and Drug Administration ordered manufacturers of attention deficit hyperactivity disorder drugs to alert patients about possible risks.

An FDA review of reports of serious cardiovascular adverse events in patients taking usual doses of ADHD products revealed reports of sudden death in patients with underlying serious heart problems or defects, and reports of stroke and heart attack in adults with certain risk factors.

Another FDA review of ADHD medicines revealed a slight increased risk for drug-related psychiatric adverse events, such as hearing voices or mania.

The ADHD medicines include Adderall, Concerta, Daytrana, Desoxyn, Dexedrine, Focalin, Metadate, Methylin, Ritalin, and Strattera."

Concerta is a long-acting form of methylphenidate, sold generically and under the brand name Ritalin. For years, those drugs' labels have listed possible psychiatric side effects, such as agitation, psychosis or transient depression.

But a routine Food and Drug Administration review of the drugs use in children turned up more reports of psychiatric reactions than anticipated, including some that aren't explicitly labeled, such as suicidal thoughts, hallucinations and violent behavior. A subsequent review of all methylphenidate products found similar reports.

The FDA can't say if the drugs actually causes those side effects -- the reports are from a database of reactions reported by medication users that make such determinations very difficult.

But, in a statement posted on its Web site, the agency said it does intend to strengthen the labeled warnings for all methylphenidate products.

Currently, the drugs' labels may downplay the seriousness of psychiatric side effects, and suggest they're only a risk in people who've already experienced psychiatric disorders, wrote FDA drug safety evaluator Kathleen Phelan.

Indeed, stimulant drugs "may exacerbate symptoms and reveal them for the first time" in children with previously unrecognized psychiatric illnesses, she wrote.

But, among 36 cases of psychiatric side effects in child Concerta users, six report histories of psychiatric illness, three deny such histories and there's no information on the rest, Phelan wrote. Further investigation is needed to determine if such side effects may also occur in people without underlying illness, she added.

FDA said it doesn't intend to change the drugs' labels right away. It is investigating whether similar behaviors are seen with additional ADHD treatments, such as Adderall and Strattera -- to avoid people switching drugs over the concern "based on incomplete safety assessments," said an FDA document prepared for a meeting of the agency's scientific advisers on Thursday.

That probe should be finished early next year.

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