• Conners’ Abbreviated Parent Questionnaire (continuous outcome) assessed by the parents at baseline, end of 4-week , at 8 weeks, and at 12 weeks
  

• Child Attention Problems (CAP) Rating Scale at the same time
  
• Drugs used throughout 12 weeks program
  

Attention Deficit Hyperactivity Disorder (ADHD) is the most common psychiatric disorder in children, with an estimated prevalence of 3-7% in school children (Diagnostic and Statistical Manual of Mental Disorders, 4th Edition, Text Revision [DSM-IV-TR]). The major symptoms of this disorder are developmentally inconsistent and chronic levels of inattention, impulsiveness, and hyperactivity.

The numbers of patients visiting physicians for ADHD are increasing from year to year. Boys are diagnosed with ADHD three times more often than girls. Although the studies on adolescents are few, the data suggest that about half of the children diagnosed with ADHD will have persistent symptoms into adolescence and some symptoms persist into adulthood. The symptoms of ADHD, if not adequately managed, will have many life long effects on the patients, families, friends, peers, teachers and colleagues.

For the patients, the disorder will impact on patient’s academic, social and emotional performance, and behavioural development, leading to poor academic achievement, low occupational status, increased risk of substance abuse and delinquency. More than 30% of children with ADHD repeat a year in school and up to 56% require remedial tutoring. Drug therapy began in the 1930s; since the 1970s, stimulants such as dexamphetamine, and methylphenidate have increasingly been used as the treatment of choice, but remain controversial. Currently available psychological treatments for ADHD include behavioural training for teachers and parents, and parenting skills classes, behavioural therapy for children with ADHD. Psychosocial treatments are generally combined with medication because each treatment alone has only a partial effect on the core symptoms of the disorder.

Growing scientific evidence, clinical experience and community attitudes are encouraging a shift to more natural and holistic forms of therapy as alternatives or adjuncts to pharmacological approaches in a variety of conditions. Meditation has a wide range of applications, but it is especially useful in treating stress and related disorders to promote calmness and enhance the attentional ability. A psychological oriented definition stated that meditation is a set of attentional practices leading to an altered state or trait of consciousness characterized by expanded awareness, greater presence, and a more integrated sense of self. Breathing Meditation could be classified as both concentrative meditation and mindfulness meditation. The concentrative ability is first developed at the beginning state and followed by mindful ability. The studies which use meditation therapy for ADHD are still scarce. In Thailand, Hassasiri A, et al (1995) had developed meditation program for children with ADHD based on Neo-humanist concept which comprised of meditation and imagery . The program was tested in pre-post test design with purposive sampling and yielded the statistical significant different at p < 0.05 (unpublished data). There has never been research about the effectiveness of breathing meditation. We are interested in conducting a randomized controlled trial to study the effectiveness in patients with attention deficit hyperactivity disorder.