Please select the eligibility criteria that correspond to the clinical trial below.
Title: Comparing the Efficacy of Methylphenidate, Dextroamphetamine and Placebo in Children Diagnosed With ADHD
Brief Summary: The study compares the efficacy of methylphenidate, dextroamphetamine and placebo on neuropsychological functioning and behavioral symptoms in 36 children diagnosed with ADHD within a double-blind cross-over design over six weeks. The assessment of ADHD followed formalized guidelines and a diagnosis of ADHD was based on DSM-IV criteria. A neuropsychological testbattery and four behavioral questionnaires were selected as efficacy variables. The neuropsychological testbattery includes Qb-test (visual attention, inhibitory control, motor activity), Score (auditory attention), Stroop Test (processing speed, inhibitory control) and Grooved Pegboard (motor speed). The participants were tested once on each type of medication. The four questionnaires are: a)Side-Effects Rating Scale (completed by a parent at the end of each of the six weeks), b)Self-Report Questionnaire (completed by the child at the end of each of the six weeks), c)Parent and Teacher Questionnaire(completed by a parent and a teacher Monday till Friday through every week), Test Performance Questionnaire (completed by the child immediately after each of the three test sessions).

Main hypothesis: A trial including both dextroamphetamine(Dex) and methylphenidate(Met) will provide better results than a trial including only Met. a)Met and Dex are efficient as treatment for ADHD compared to placebo, albeit Dex has moderately better effect compared to Met. b)At an individual level some of the participants will show positive response to one type of stimulants and no response, mixed response or adverse response to the other type of stimulant. c)Neuropsychological tests and behavioral questionnaires are moderately in agreement but also add unique information in the assessment of the effect of stimulants. d)Qb-test is sensitive and valid as a measure of the effect of stimulants.


Options:
A: Inclusion Criteria:

* Age from 9.0 to 14.0.
* ADHD diagnosis following assessment at a child \& adolescent outpatient clinic.
* Clarification for stimulant treatment.

Exclusion Criteria:

* Moderate or severe mental retardation.
* Psychosis.
* Proven brain damage.
* Sensory deficits and/or motor impairments that make the individual in question unsuitable for the relevant tests.
* Epilepsy.
* The child has previously been prescribed stimulant medication or is being treated with such medication.
* The child commutes between parents or there are other factors that substantially reduce the possibility of obtaining reliable observations from parents (The child needs to live in one place through out the whole trial since otherwise might severely influence the child's behaviour and the observations).
B: Inclusion Criteria:

* ADHD diagnosis of all subtypes (except Not Otherwise Specified)
* Patients with total or subscale Attention Deficit Hyperactivity Disorder Rating Scale (ADHD RS-IV) scores \> =90th percentile relative to the general population of children by age and gender
* Patients currently receiving ADHD medication must be inadequately managed on their current stimulant dose and meet this criteria at the screening visit
* Ability to read and understand English
* Ability to attend school regularly.

Exclusion Criteria:

* Estimated Full Scale IQ score of 80 or below
* Severe Learning Disability
* History of, or current, primary diagnosis of: severe anxiety disorder, conduct disorder, psychotic disorders, pervasive developmental disorder, eating disorder, obsessive-compulsive disorder, sleep disorder, major depressive disorder, bipolar disorder, substance use disorder, chronic tic disorder, personal or family history of Tourette's syndrome
* Weight \< 3rd percentile for age
* History of hospitalization for treatment of a mood, anxiety, or psychotic disorder
* History of failed response to methylphenidate.
C: Inclusion Criteria:

1. Subjects must be male or female children (6 to 12 years at the time of consent).
2. Subjects must have a diagnosis of ADHD as defined by DSM5 criteria and confirmation using the Mini International Neuropsychiatric Interview for Children and Adolescents (MINI-KID).
3. Subjects must have a baseline ADHD-RS-IV score at or above the 90th percentile normalized for sex and age in total score. In addition, this ADHD-RS-IV total score must be ≥26 at Baseline.
4. Subjects must have a Clinical Global Impression of Severity (CGI-S) score ≥4 and a CGI-P score \>10 at the Baseline Visit.
5. Subjects have demonstrated, in the judgment of the investigator, at least a partial clinical response to MPH.
6. Parental or legal guardian confirmation of the child's before-school functional impairment and/or difficulties performing a morning routine of at least 30 minutes minimum duration occurring between 6:00 and 9:00 am.
7. Subject body weight must be ≥20 kg.
8. Subject must be considered clinically appropriate for treatment with MPH and HLD200, including ability to swallow treatment capsules.
9. Subject must be in general good health based upon the medical history, physical, and laboratory examinations (including urine drug screen).
10. Subject and parent or legal guardian must be able to read, write, and/or understand at a level sufficient to provide informed consent (parent/legal guardian) and assent (subject) prior to study participation and to complete study-related materials. Subject and parent or legal guardian must plan to be available for the entire study period.
11. Female subjects of childbearing potential (i.e., post-menarche) are required to have a negative result on urine pregnancy testing at screening (and will be given specific instructions for avoiding pregnancy during the study).
12. A medically highly effective form of birth control must be used during the study and for 90 days thereafter for subjects of either sex of childbearing potential. Examples of medically highly effective forms of birth control are as follows:

    * No sexual activity
    * Use of acceptable methods of birth control including intra-uterine device, oral, implantable,or injectable contraceptives.

Exclusion Criteria:

1. History of, or current, medical condition or laboratory result which, in the opinion of the investigator, unfavorably alters the risk-benefit of study participation, may jeopardize subject safety, or may interfere with the satisfactory completion of the study and study-related procedures.
2. Serious structural cardiac abnormalities, cardiomyopathy, serious heart rhythm abnormalities, or other cardiac problems that may place the subject at increased vulnerability to the sympathomimetic effects of a stimulant drug.
3. History of seizure disorder (except febrile seizures prior to age 5 and with last occurrence at least 1 year prior to study participation), Tourette's disorder, or intellectual disability of minor severity or greater (DSM5 criteria).
4. History of psychosis, bipolar disorder, anorexia nervosa, bulimia, or suicide attempt. Current depression, anxiety, conduct/behavior disorder, substance use disorder, or other psychiatric condition which, in the investigator's opinion, may jeopardize subject safety or may interfere with the satisfactory completion of the study and study-related procedures.
5. Active suicidal ideation as evidenced by an ideation score of 2 or greater on the C-SSRS.
6. History of severe allergic reaction or intolerance to MPH.
7. Alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin, or creatinine greater than 1.5x the upper limit of normal. Elevated bilirubin due only to Gilbert's syndrome is not exclusionary.
8. History of alcohol abuse or illicit drug use.
9. Use of prescription medications (except per protocol allowed medications) within 7 days of Baseline (Visit 2), except for ADHD stimulant medication (72 hours) and monoamine oxidase inhibitors (MAOIs) (14 days), and over-the-counter medications (except birth control and allowed medications) within the 3 days preceding Baseline (Visit 2). Medications not covered in allowed medications or prohibited medications must be cleared by the medical monitor prior to enrolling the subject.
10. Use of psychotropic medications including antidepressants, mood stabilizers, and antipsychotics.
11. Participation in a clinical trial with an investigational drug within the 30 days preceding study enrollment.
12. Previous treatment experience with HLD200.
13. Positive screening for illicit drug use or nicotine and/or current health conditions or use of medications that might confound the results of the study or increase risk to the subject.
14. In the opinion of the investigator, the subject may have problems complying with the protocol or the procedures of the protocol, or for which the study could pose unnecessary safety risks. This includes current health conditions or use of medications that might confound the results of the study or increase risk to the subject.
15. A sibling or step-sibling that is concurrently participating in this study who resides with and is cared for by the same parent/legal guardian as the subject.
D: Inclusion Criteria:

* Age ≥ 12 and ≤ 25 years;
* Patients from 25 to 120 kg
* ADHD diagnosed according to the criteria of the DSM - V
* ADHD-RS-IV ≥ 28 test score;
* Without medication by methylphenidate for at least 6 months;
* Lack of psychiatries co-morbidities associated with a contraindication to treatment with methylphenidate (confirmed by MINI or MINI Kid); absence of BPD (tracked by the self-administered questionnaire MSI - BPD).
* Cannabis dependence objectified by a positive qualitative urinary dosage and a score ≥ 7 to CAST questionnaire;
* Consent of parents (child/teenager \&lt; 18 years) or young age if ≥ 18 years - patients of childbearing age agreeing to use a contraceptive method during the duration of the test

Exclusion Criteria:

Patients placed in child welfare (ASE).

* Pregnant patients or nursing
* No affiliation to a scheme of social security (beneficiary or beneficiary)
* Contraindications to treatment with methylphenidate :known hypersensitivity to methylphenidate or any of the excipients, glaucoma, pheochromocytoma,treatment by non selective irreversible inhibitors of the mono-amine oxidase (MAOI) and also for at least 14 days after stopping treatment with an MAOI because of the risk of hypertensive thrust,Treatment by other sympathomimetic indirect or sympathomimetic (oral and/or nasal way) alpha,Hyperthyroidism or wrong,diagnosis or history of severe depression, anorexia nervosa or disorders anorexia, suicidal tendencies, mood disorders, psychotic symptoms, mania, schizophrenia, psychopathic personality disorder, or limit (borderline), occlusal,diagnosis or history (affective) bipolar disorder severe (for type 1) and episodic (and poorly controlled), pre-existing cardiovascular disorders including severe hypertension, heart failure, pad angina, congenital heart disease with hemodynamic impact; cardiomyopathy, myocardial infarction, arrhythmias and channelopathies (disorders caused by a dysfunction of ion channels) that can potentially be life-threatening, pre-existence of disorders, stroke, cerebral aneurysm, vascular abnormalities, including stroke or Vasculitis and major Patient protected by law.

Answer: A