Please select the eligibility criteria that correspond to the clinical trial below.
Title: Methylphenidate for Hyperactivity and Impulsiveness in Children and Adolescents With Pervasive Developmental Disorders
Brief Summary: This study will evaluate the efficacy and safety of methylphenidate for treating hyperactivity, impulsiveness, and distractibility in 60 children and adolescents with Pervasive Developmental Disorders (PDD). Methylphenidate (Ritalin)is approved by the Food and Drug Administration for the treatment of children and adolescents with Attention Deficit Hyperactivity Disorder (ADHD). Data supporting its safety and effectiveness in treating ADHD symptoms in PDD are limited. Children and adolescents who do not show a positive response to methylphenidate will be invited to participate in a pilot study of the non-stimulant medication guanfacine (Tenex).


Options:
A: Inclusion Criteria:

1. Male or female outpatients 18 to 60 years of age.
2. Meet Diagnostic and Statistical Manual of Mental Disorders, 4th Edition, Text Revision. The diagnosis will be confirmed with Autism Diagnostic Interview-Revised and Autism Diagnostic Observation Schedule .
3. Have a Clinician's Global Impression-Severity score ≥ 4 (moderately ill) at Screening and Baseline.
4. If already receiving stable nonpharmacologic educational, behavioral, and/or dietary interventions, have continuous participation during the preceding 3 months prior to Screening and will not electively initiate new or modify ongoing interventions for the duration of the study.
5. Have normal physical examination and laboratory test results at Screening. If abnormal, the finding(s) must be deemed clinically insignificant by the Investigators.
6. The patient must be able to speak and understand English sufficiently to understand the nature of the study and to allow for the completion of all study assessments.
7. Have a normal Intelligence Quotient (\>70) supported by the Wechsler Abbreviated Scales of Intelligence.

Exclusion Criteria:

1. Patients born prior to 35 weeks gestational age.
2. Patients with any primary psychiatric diagnosis other than autism at Screening: a history of attention deficit hyperactivity disorder, bipolar disorder, psychosis, posttraumatic stress disorder, schizophrenia, or major depressive disorder.
3. Patients with a medical history of neurological disease, including, but not limited to, epilepsy/seizure disorder (except simple febrile seizures), movement disorder, tuberous sclerosis, fragile X, and any other known genetic syndromes, or known abnormal magnetic resonance imaging/structural lesion of the brain.
4. Pregnant female patients.
5. Patients with a medical condition that might interfere with the conduct of the study, confound interpretation of the study results, or endanger their own well-being. Patients with evidence or history of malignancy or any significant hematological, endocrine, cardiovascular (including any rhythm disorder), respiratory, renal, hepatic, or gastrointestinal disease.
6. Patients taking psychoactive medication(s) (e.g., stimulants, antidepressants, antipsychotics, antiepileptics, anxiolytics, clonidine).
7. Patients who plan to initiate or change nonpharmacologic interventions during the course of the study.
8. Patients unable to tolerate venipuncture procedures for blood sampling.
9. Patients who, in the Investigator's opinion, might not be suitable for the study.
B: * Diagnosis of PDD (including Asperger's Disorder and Autistic Disorder)
* Clinically significant symptoms of ADHD
* Mental age of at least 18 months
* Blood pressure within normal ranges for age and gender
* Weight 16 kg or more
* Absence of chronic tic disorder
* Absence of any medical condition that would be incompatible with the study treatments
* Absence of evidence of hypersensitivity to study treatments
C: Inclusion Criteria - Rollover:

* Completed 8 weeks of treatment in one of the following double-blind clinical trials: CN138-178 \[NCT00332241\] or CN138-179 \[NCT00337571\]
* No significant protocol violations and sufficient medical justification to continue on open-label treatment with aripiprazole

Inclusion Criteria - De Novo:

* Meets current Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV TR) diagnostic criteria for AD and demonstrates serious behavioral problems - diagnosis confirmed by Autism Diagnostic Interview-Revised (ADI-R) or the patient meets the current Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV TR) diagnostic criteria for AD and has a history of behavioral problems that are currently being treated with psychotropic medication
* Mental age of at least 18 months
* Male or female 6 to 17 years of age, inclusive, at the time of enrollment

Exclusion Criteria:

* Patients considered treatment resistant to neuroleptic medication based on lack of therapeutic response to 2 different neuroleptics after treatment of at least 3 weeks each
* Patients previously treated and not responding to aripiprazole treatment
* The patient is currently diagnosed with another disorder on the autism spectrum, including pervasive developmental disorder-not otherwise specified (PDD-NOS), Asperger's Disorder, Rett's Disorder, Fragile-X Syndrome or Childhood Disintegrative Disorder
* Current diagnosis of bipolar disorder, psychosis, schizophrenia, or major depression
* A seizure in the past year
* History of severe head trauma or stroke
* Non-pharmacologic therapy (e.g. psychotherapy, behavior modification) should be stable prior to screening and consistent throughout the study
D: Inclusion Criteria:

* Able to walk
* Diagnosis of Autistic Disorder, Asperger's Disorder, or PDD-NOS
* Have a score greater than or equal to (\>) 8 on the sum of items 1A, 2, 3 and 5 of the Compulsions Subscale of the Revised CYBOCS.
* Have a rating of at least moderate behavioral disturbance based on the modified Clinical Global Impression-Severity of Illness score (CGI-S) at the time of screening (See description below).
* Be free of psychotropic medication for at least one month for fluoxetine, two weeks for other SSRIs and neuroleptics, and for 5 days for stimulants prior to baseline ratings.
* Be judged reliable for medication compliance and agree to keep appointments for study contacts and tests as outlined in the protocol (both subject and guardian(s)).

Exclusion Criteria:

* Medical contraindications to therapy with SSRIs
* Prior exposure to citalopram (or escitalopram) of sufficient dose or duration to determine response status
* History of treatment failure to a clinically adequate trial of two select SSRIs
* Diagnosis of Rett's Disorder or Childhood Disintegrative Disorder
* Uncontrolled epilepsy, with a seizure within past 6 months
* Child weighs less than (\<) 15 kg at screening contact.
* Pregnancy
* Presence of chronic medical conditions that might interfere with study participation or where study participation would be contraindicated
* Clinically significant abnormal baseline laboratory testing
* History of bipolar disorder or manic episode induced by antidepressant exposure
* Documented need for ongoing psychotropic medications besides study medication (with the exception of stable dose (at least 3 month) anti-convulsants for seizures).
* Concomitant medication that would interfere with participation in the study.
* Recent (\< 2 months) initiation of behavior therapy (such as parent training, applied behavior analysis or behavior modification) in a clinic, with a private practitioner or in a school program. Participants who are in an established behavior therapy program (defined as greater than (\>) 2 months for clinic or private practitioner or greater than (\>) 1 month for school program) can be included in the study. Families will be asked not to initiate any new behavior therapy during the study.

Answer: B