( SAN DIEGO May 23 2007 /PRNewswire-Fi...)Daytrana (methylphenidate transdermal system) Provides Significant,Effectiveness in ADHD Symptom Relief in Both Boys and Girls,Health

SAN DIEGO, May 23, 2007 /PRNewswire-FirstCall/ -- Shire plc announced today that DAYTRANA(TM) (methylphenidate transdermal system), its Attention Deficit Hyperactivity Disorder (ADHD) patch, had significant efficacy in reducing the symptoms of ADHD in both male and female children aged 6 to 12 years, according to clinical trial results reported at the American Psychiatric Association (APA) annual meeting in San Diego.

"Few clinical studies have examined gender differences in the response to ADHD treatments. Our study documented that DAYTRANA offered a favorable safety profile and was an effective ADHD treatment in both boys and girls," said Robert Findling, M.D., lead investigator and Professor of Psychiatry at and Director of the Division of Adolescent and Child Psychiatry at University Hospitals Case Medical Center. "The study provides a platform to open a dialogue about gender and ADHD."

Approximately 4.4 million U.S. children aged 4 to 17 years -- about 7.8 percent of all school-age children -- have been diagnosed with ADHD at some point in their lives, according to the U.S. Centers for Disease Control and Prevention (CDC). Studies estimated that 11.0 percent of boys have been diagnosed with ADHD in contrast to only 4.4 percent of girls. Experts believe that girls with ADHD are underdiagnosed and, therefore, undertreated.

Shire's DAYTRANA is the first and only patch medication approved by the U.S. Food and Drug Administration (FDA) to treat the symptoms of ADHD in children aged 6 to 12 years. DAYTRANA is available in four dosage strengths - 10 mg, 15 mg, 20 mg and 30 mg - all designed for once-daily use. When worn for the recommended nine hours, efficacy has been demonstrated from the first time point measured (two hours) through the 12-hour time point. Because Daytrana is a patch, physicians may recommend that patients shorten the wear time if shorter duration of effect is desired or t
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