Carnitine as an Adjunct to Methylphenidate for the Treatment of Attention Deficit Hyperactivity Disorder

Study Overview
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Brief Summary
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Attention-deficit hyperactivity disorder (ADHD) is the most common neurobehavioural disorder of childhood. The investigators hypothesized that carnitine would be beneficial for treatment of ADHD, and this could be evaluated in a double blind, randomized, parallel group comparison of carnitine+methylphenidate and methylphenidate +placebo. This will be a six-week, parallel group, randomized clinical trial undertaken in an outpatient child and adolescent clinic at Roozbeh Psychiatric Hospital in Tehran, Iran during April 2010-May 2010. 40 male and female subjects, ages 6 to 17 years with a Diagnostic and Statistical Manual, Fourth Edition, Text Revision (DSM-IV-TR) diagnosis of ADHD will be study population of this trial. At screening, investigators conduct a psychiatric evaluation with the DSM-IV-TR criteria for ADHD and the Kiddie Schedule for Affective Disorders and Schizophrenia-Present and Lifetime diagnostic interview and perform a complete medical history and physical examination. The diagnosis of ADHD will be confirmed by a child and adolescent psychiatrist before participants will be initiated into the study. All patients will be newly diagnosed. Parents were carefully interview and ask to rate the severity of the DSM-IV-TR ADHD symptoms that their children display at home. Children will be excluded if they have a history or current diagnosis of pervasive developmental disorders, schizophrenia or other psychiatric disorders(DSM-IV axis I); any current psychiatric comorbidity that required pharmacotherapy; any evidence of suicide risk and mental retardation (I.Q. <70). In addition, patients will be excluded if they have a clinically significant chronic medical condition, including organic brain disorder, seizures and, current abuse or dependence on drugs within 6 months. Additional exclusion criteria will be hypertension, hypotension. To participate, parents and children have to be willing to comply with all requirements of the study. After a description of the procedures and purpose of the study, written informed consent will be obtained from each patient's parent or guardian. Informed consent will receive before the administration of any study procedure or dispensing of study medication in accordance with the ethical standards of the investigative site's institutional review board and with the Helsinki declaration of 1975, as revised in 2000. The protocol will be approved by the Institutional Review Board (IRB) of Tehran University of Medical Sciences. Patients will be randomized to receive a carnitine+methylphenidate and methylphenidate +placebo in a 1: 1 ratio using a computer-generated code. All study subjects will be randomly assigned to receive treatment using methylphenidate at a dose of 20-30 mg/day depending on weight (20 mg/day for <30 Kg and 30 mg/day for >30 Kg)+ Carnitine 500-1500 mg/day (depending on weight ) or methylphenidate at a dose of 20-30 mg/day depending on weight (20 mg/day for <30 Kg and 30 mg/day for >30 Kg)+ Placebo for a 6 week double blind, randomized clinical. The principal measure of outcome will be the Parent and Teacher ADHD Rating Scale-IV that has been used extensively in Iran in school-age children and provides valid measures of behavioral abnormality and attention trial. Side effects will be systematically recorded throughout the study and will be assessed using a checklist that comprises 20 side effects including psychic, neurologic, autonomic and other side effects, administered by a child psychiatrist on days 7, 21and 42. Side effects, administered by a child psychiatrist on days 7, 21and 42.

Official Title
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Carnitine as an Adjunct to Methylphenidate for the Treatment of Attention Deficit Hyperactivity Disorder Children and Adolescents in the Placebo Control Double -Blind Randomized Clinical Trail

Conditions
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Attention Deficit Hyperactivity Disorder

Intervention / Treatment
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* Drug: Methylphenidate+placebo
* Drug: methylphenidate+carnitine


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: The diagnosis of ADHD will be confirmed by a child and adolescent psychiatrist before participants will be initiated into the study. All patients will be newly diagnosed. Parents were carefully interview and ask to rate the severity of the DSM-IV-TR ADHD symptoms that their children display at home. Exclusion Criteria: Children will be excluded if they have a history or current diagnosis of pervasive developmental disorders, schizophrenia or other psychiatric disorders(DSM-IV axis I) Any current psychiatric comorbidity that required pharmacotherapy Any evidence of suicide risk and mental retardation (intelligence quotient [I.Q.] <70). In addition, patients will be excluded if they have a clinically significant chronic medical condition, including organic brain disorder, seizures and, current abuse or dependence on drugs within 6 months. Additional exclusion criteria will be hypertension, hypotension.

Ages Eligible for Study
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Minimum Age: 6 Years
Maximum Age: 17 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Methylphenidate+placebo<br>methylphenidate at a dose of 20-30 mg/day depending on weight (20 mg/day for <30 Kg and 30 mg/day for >30 Kg)+ Placebo | Drug: Methylphenidate+placebo<br>* methylphenidate at a dose of 20-30 mg/day depending on weight (20 mg/day for <30 Kg and 30 mg/day for >30 Kg)+ Placebo<br>|
| Experimental: methylphenidate+carnitine<br> | Drug: methylphenidate+carnitine<br>* methylphenidate at a dose of 20-30 mg/day depending on weight (20 mg/day for <30 Kg and 30 mg/day for >30 Kg)+ Carnitine 500-1500 mg/day (depending on weight )<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The principal measure of outcome will be the Parent and Teacher ADHD Rating Scale-IV | Parent and Teacher ADHD Rating Scale-IV that has been used extensively in Iran in school-age children and provides valid measures of behavioral abnormality and attention trial. | 6 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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ADHD, carnitine, methylphenidate