The U.S. Food and Drug Administration reports that 25 people died and 54 experienced serious cardiovascular problems after taking medications to treat attention deficit hyperactivity disorder between 1999 and 2003.

Nineteen of the fatalities and twenty-six of the nonfatal cases were children, reports HealthDay News

The cardiovascular problems include heart attack, stroke, hypertension, palpitations and arrhythmia, according to the FDA.

The FDA review also contains information about 26 other deaths involving patients on ADHD drugs between 1969 and 2003. These involved suicides, intentional overdoses, drowining, heat stroke and underlying diseases, reports The Associated Press.

The report found less than one death or serious injury per 1 million ADHD drug prescriptions filled. The one exception was the 1.79 cases per million of nonfatal cardiovascular or cerebrovascular problems in adults treated with amphetamines.

The report cautions that even though sudden death in children treated with ADHD drugs is rare, it "warrants close monitoring."