Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized, Placebo-Controlled Trial of D-Cycloserine for the Enhancement of Social Skills Training in Pervasive Developmental Disorders
Brief Summary: The purpose of this study is to determine the effectiveness of D-cycloserine for improving social impairment in child with pervasive developmental disorders (PDD).


Options:
A: Inclusion Criteria:

* Male and Female
* 18 to 55 years old
* Meet Diagnostic and Statistical Manual-IV (DSM-IV), Autism Diagnostic Observation Schedule(ADOS), and Autism Diagnostic Interview-Revised (ADI-R) standards for Autism Spectrum Disorder or Aspergers Syndrome
* Have a high, normal or near normal Intelligent Quotient
* Speak and Understand English fluently

Exclusion Criteria:

* Born prior to 35 weeks gestational age
* Any primary psychiatric diagnosis other than autism at the time of screening
* Medical history of neurological disease
* Medical history of known MRI/structural lesion of the brain
* Patients who are pregnant
* With a medical condition that might interfere with the conduct of the study, confound interpretation of study results or endanger their own well being
* With evidence or history of malignancy or any significant hematological, endocrine, cardiovascular, respiratory, renal, hepatic or gastrointestinal disease
* Taking psychoactive medications
* Who plan to initiate or change nonpharmacologic interventions during the study course
* Who are unable to tolerate venipuncture procedures for blood sampling
B: Inclusion Criteria:

* Male or female children and adolescents aged 5-17 years, inclusive, at the time of screening.
* Judged by the investigator to be in good health at screening based upon the results of a medical history, physical examination, 12-lead ECG, and clinical laboratory test results.
* Patients must have a previous documented diagnosis of ASD by a medical or psychological professional.
* Patients must be assessed by the Investigator as being moderately to severely impacted due to ASD
* Patients who are taking psychotropic medication(s) should be on a stable regimen of no more than 2 medications for at least 4 weeks preceding study Screening and must maintain that regimen throughout the study. Psychotropic medications include (but are not limited to) antipsychotics, antidepressants, mood stabilizers, anxiolytics, and ADHD medications.
* Patients with a history of seizure disorders must currently be receiving treatment with a stable regimen of one or two AEDs, or must be seizure-free for 1 year if not currently receiving AEDs.
* Patients with seizures should be on a stable regimen for the 3 months preceding study enrollment of no more than 2 of the permitted anti-epileptic drugs (AEDs). Patients must remain on a stable AED dose throughout the study.
* If patients are receiving non-pharmacological educational, behavioral, and/or dietary interventions or therapies, they must be stable and have been doing so for 2 months prior to screening. Changes with school breaks are expected and do not apply.
* Patients must have a BMI of between 12-32 kg/m2 (inclusive).
* Females of childbearing potential and must have a negative serum pregnancy test at the Screening Visit and a negative urine pregnancy test at all designated visits.
* Patients/caregivers agree to abide by all study restrictions and comply with all study procedures.
* Parents/caregivers must be able to read and respond to questions and questionnaires in English.
* Patients/caregivers must be adequately informed of the nature and risks of the study and give written informed consent prior to screening.
* Parents/caregiver(s) must provide written consent to assist in study drug administration.
* In the Investigator's opinion, patients/caregivers are reliable and willing and able to comply with all protocol requirements and procedures (including scheduled visits and confinement periods).

Exclusion Criteria:

* Adolescent females who are pregnant, nursing, or planning a pregnancy. Females of childbearing potential and male patients with a partner of childbearing potential who are unwilling or unable to use standard acceptable methods of contraception (including abstinence, hormonal contraception, diaphragm, cervical cap, vaginal sponge, condom, or intrauterine device) for the duration of the study and for 1 month after the last dose of study medication.
* History of significant allergic condition, significant drug-related hypersensitivity, or allergic reaction to any compound or chemical class related to CBD (Epidiolex) or its ingredients.
* Exposure to any investigational drug or device \< 30 days prior to screening, or plans to take another investigational drug at any time during the study.
* Use of any THC or CBD-containing product within 4 weeks of Screening Visit, planned use during the study, or positive THC urine test at screening.
* Patient is using the following medications: clobazam (Onfi, Frisium), felbamate (Felbatol), vigabatrin (Sabril), or everolimus (Afinitor).
* Plan to initiate or change pharmacologic or non-pharmacologic interventions during the course of the study.
* Patient has ALT, AST, total bilirubin, or creatinine levels ≥ 2 times the ULN, alkaline phosphatase levels ≥ 3 times the ULN, or Hct \<1.2 times the LLN as determined from screening safety laboratories.
* Severe or unstable symptoms of ASD that may interfere with the study outcome evaluations and interpretation of results.
* Suffering from acute or progressive neurological disease, psychosis, schizophrenia or any psychiatric disorder or severe psychiatric abnormalities that are likely to require changes in drug therapy or interfere with the objectives of the study or the ability to adhere to protocol requirements.
* Has suspected or confirmed cardiovascular disease.
* History of treatment for, or evidence of, drug or alcohol abuse within the past year.
C: Meets DSM-IV, ADI, and ADOS criteria for autistic disorder

Age 5-17.

Outpatients

Parent/legal guardian signing informed consent, and assent documented for patient with demonstrated capacity to provide it.

Sexually active females of childbearing potential must use an acceptable method of birth control (oral contraceptive medications \[the administration of which must be supervised by a parent or guardian\], IUD, depot medication or tubal ligation) and have a negative serum pregnancy test prior to entry into the study.

Subject scores at least "4" (moderately ill) on the Clinical Global Impression-Severity Scale for Autistic Disorder (CGI-AD).

Subject meets the following criteria at pre-study diagnostic assessment and baseline assessment: OAS-M 13 or ABC-Irritability Subscale 18 (raw scores).

Subjects with history of seizures, who have been seizure-free for 6 months on a stable dose of anticonvulsant medication other than divalproex sodium or related formulations (e.g., depakene). Non-medicated subjects with a history of seizures who have been seizure-free for 6 months. Subjects with abnormal EEG but no clinical seizures.

State exclusion criteria for enrollment in study:

Subjects who are pregnant or nursing mothers. Sexually active women of childbearing potential who are not using adequate birth control measures (detailed above in inclusion criteria).

Subjects with overall adaptive behavior scores below the age of two years on the Vineland Adaptive Behavior Rating Scale.

Subjects with active or unstable epilepsy.

Subjects with any of the following past or present mental disorders: schizophrenia, schizoaffective disorder or organic mental disorders.

Subjects who are a serious suicidal risk.

Subjects with clinically significant or unstable medical illness that would contraindicate participation in the study, including hematopoietic or cardiovascular disease, pancreatitis, liver toxicity, and polycystic ovary syndrome.

Subjects reporting history of encephalitis, phenylketonuria, tuberous sclerosis, fragile X syndrome, anoxia during birth, pica, neurofibromatosis, hypomelanosis of Ito, hypothyroidism, Duchenne muscular dystrophy, and maternal rubella.

Patients with history of the following:

gastrointestinal, liver, or kidney, or other known conditions which will presently interfere presently with the absorption, distribution, metabolism, or excretion of drugs; cerebrovascular disease or brain trauma; clinically significant unstable endocrine disorder, such as hypo- or hyperthyroidism; recent history or presence of any form of malignancy

Treatment within the previous 30 days with any drug known to a well-defined potential for toxicity to a major organ

Subjects with clinically significant abnormalities in laboratory tests or physical exam.

Subjects likely to require ECT or any other psychotropic medication during the study, unless otherwise permitted.

Subjects unable to tolerate taper from psychoactive medication if necessary.

Subjects with a history of hypersensitivity or severe side effects associated with the use of divalproex sodium, or other an ineffective prior therapeutic trial of divalproex sodium (serum levels within range of 50-100 ug/ml for 6 weeks).

Subjects who have received any of the following interventions within the prescribed period before starting treatment:

investigational drugs within the previous 30 days; depot neuroleptic medication; psychotropic drugs not permitted for concurrent use in the study within the previous seven days; fluoxetine within the previous five weeks.

Subjects who have begun any new alternative non-medication treatments, such as diet, vitamins, and psychosocial therapy, within the previous three months.

Subjects with any organic or systemic disease or patients who require a therapeutic intervention, not otherwise specified, which would confound the evaluation of the safety of the study medication.

Subjects who reside in a remote geographical area who do not have regular access to transportation to the clinical facility.
D: Inclusion Criteria:

* DSM-IV-TR diagnosis of autism, Asperger's disorder, or PDD not otherwise specified (NOS) base on a semi-structured review of DSM-IV-R criteria and mental status examination as wll as a complete parental history obtained from the Autism Diagnostic Interview-Revised (ADI-R) and a complete systematic patient interview utilizing the Autism Diagnostic Observation Schedule (ADOS).
* Males and females ages 5-11 years.
* Significant social impairment as evidenced by a parent-rated Social Responsiveness Scale (SRS) T-score of 60 or greater.
* TSSA score of 70% or less on both parent questionnaire and child assessment. Children not showing significant impairment in the four specific social skill areas (greetings/goodbyes, conversations, game play, and understanding emotions) targeted by the SST are less likely to benefit from treatment.
* Communication Standard Score of 70 or greater on the Vineland-II.
* Full Scale IQ greater than 70.
* Subjects must not be taking any psychotropic drugs affecting glutamate neurotransmission (riluzole, memantine, acamprosate, topiramate, amantadine, among others). Subjects may not be taking more than two psychotropic drugs. Dosing of all concomitant psychotropic drugs targeting core social and/or communication impairment must be stable for eight weeks prior to randomization. Dosing of all concomitant psychotropic drugs treating other features associated with pervasive developmental disorders (insomnia, inattention, hyperactivity, anxiety, irritability among others0 must be stable for two weeks (with the exception of four weeks for fluoxetine) prior to randomization.
* Able to participate in group SST based on semi-structured parent and child interview.
* Legal guardian has provided written informed consent and the subject has provided written informed assent. Expectation that a majority of subjects will be able to assent but the potential for the younger children and/or those that are cognitively impaired will not be able to assent.

Exclusion Criteria:

* Subjects with diagnoses of Rett's disorder or childhood integrative disorder will not be enrolled since these disorders have a different etiology, course, and treatment response. Furthermore, children with these disorders may not function at a high enough level in terms of cognition or language in order to benefit from the SST.
* Initiation of a new psychosocial intervention within 90 days prior to randomization. Participants who have recently had a significant change in their psychosocial interventions will not be eligible until this intervention has been stable for 90 days in order to avoid confounding results of the study. Stable interventions (e.g., speech and occupational therapy), with the exception of concurrent social skills training, will be allowed to continue during the course of the study. Minor changes in ongoing treatment (e.g., missed therapy sessions due to holiday/vacation; planned break in therapy due to school holidays) are not considered significant.
* Subjects exhibiting significant disruptive, aggressive, self-injurious, or sexually inappropriate behavior will not be eligible for enrollment.
* Presence of current DSM-IV-TR psychiatric disorders that require alternative pharmacotherapy or different treatment including psychotic disorders, or major affective disorders, obsessive-compulsive disorder, panic disorder, or substance related disorders.
* Presence of any medical condition that would make treatment with DCS less safe. Subjects with significant cardiac, hepatic, or renal disease will be excluded due to concerns about pharmacokinetic alterations or adverse effects. Subjects with a history of a seizure disorder are permitted if the subject has been seizure free for 6 months and is currently treated with an anticonvulsant that has been stable for 4 weeks. D-Cycloserine is an U.S. FDA Pregnancy Category C drug. Because of the unknown effects of DCS on the developing human fetus, females of childbearing potential will be given a urine pregnancy test and required to use a suitable form of birth control during the study. A positive pregnancy test result excludes the subject.
* Presence of any other condition that would make the participants unable to comply with the requirements of the study for any reason.

Answer: D