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CompletedNCT01243242Updated Apr 20, 2012Results posted

Clinical Efficacy & Safety, of Metadoxine (MG01CI) Extended Release in Attention-Deficit Hyperactivity Disorder (ADHD)

A Phase 2 interventional study of Metadoxine (MG01CI) in ADHD, sponsored by Alcobra Ltd.. Completed at 2 sites in Israel. Open to participants aged 18 Years to 50 Years. Per ClinicalTrials.gov, last updated 2012-04-20.

Sponsored by Alcobra Ltd. · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
120
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate efficacy, safety and tolerability of metadoxine (MG01CI) extended release formulation for the treatment of adults diagnosed with ADHD

Read the detailed description

This will be a randomized, double-blind, placebo-controlled, parallel-group, multicenter study in adult subjects with ADHD.

Eligible subjects will be randomly assigned in a 1:1 ratio to one of two treatment groups, 1400 mg Metadoxine (MG01CI) and Placebo. The study will consist of three periods: a screening period of up to 2 weeks, a 6-week double-blind treatment period, and a 2-week safety follow-up period. The total duration of subject participation will be \~10 weeks.

Overview of Study Visits

Screening Period:

Visit 1 - Screening/Baseline Visit (up to 14 days prior to dosing)

Treatment Period:

Visit 2 - Day 0 (Randomization Visit) Visit 3 - Day 7 ± 2 days Visit 4 - Day 14 ± 2 days Visit 5 - Day 28 ± 2 days Visit 6 - Day 42 ± 2 days

Follow-up period:

Visit 7 - Day 56 ± 3 days

02

Conditions studied

  • ADHD

Keywords

  • ADHD,Adults,MG01CI,METADOXINE
03

In context

Attention Deficit Disorder with Hyperactivity

1,514 studies on the registry are indexed under Attention Deficit Disorder with Hyperactivity; 255 are open to participants now.

This study's enrollment of 120 is above the median of 72 across 1,207 interventional studies indexed under Attention Deficit Disorder with Hyperactivity.

Browse Attention Deficit Disorder with Hyperactivity studies →

Lead sponsor

Alcobra Ltd. is the lead sponsor of 8 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Adult males and females, 18 to 50 years old, inclusive, at screening visit
  2. Diagnosed with ADHD based on

    1. DSM-IV criteria for ADHD as assessed by the Adult ADHD Clinician Diagnostic Scale (ACDS V1.2)
    2. SCID clinical interview
  3. Clinical severity of at least a moderate level (Clinical Global Impression score of 4 or above)
  4. Female subjects with childbearing potential must agree to use effective contraceptive and have negative urine pregnancy test at screening visit
  5. Able to attend the clinic regularly and reliably
  6. Able to swallow tablets/capsules
  7. Able to understand, read, write and speak Hebrew fluently to complete study related materials
  8. Able to understand and sign written informed consent to participate in the study

Exclusion criteria

Exclusion Criteria:

  1. Subjects who were non-responder to at least two ADHD treatments
  2. Subjects with any medical or psychiatric condition (e.g. schizophrenia, personality disorder as diagnosed by DSM-IV) or clinical significant or unstable medical or surgical condition that may preclude safe and complete study participation as determined by medical history, physical examination, neurological exam, laboratory tests or ECG or based on the opinion of the Investigator; common diseases such as hypertension, type 2 diabetes mellitus, hyperlipidemia, etc. are allowed per the Investigator's judgment, as long as they are stable and controlled by medical therapy that is constant for at least 8 weeks prior to randomization and throughout the study
  3. Any prescription or non-prescription ADHD medications during the 7 days prior to the screening visit
  4. Known or suspected HIV-positive or with advanced diseases such as AIDS, Hepatitis C, Hepatitis B or tuberculosis
  5. History of allergy or sensitivity to B complex vitamins
  6. History or suspicion of PDD, NLD or other psychotic conditions
  7. Use of Vitamin B throughout the study
  8. Use of ADHD medications throughout the study
  9. Use of any psychiatric medications throughout the study
  10. Use of investigational medication/treatment in the past 30 days prior to the screening visit per the discretion of the Investigator
  11. Use of any medication or food supplement not considered acceptable by the clinical Investigator or the medical monitor during the 14-day period before randomization
  12. Current (or history within the last 6 months) of drug dependence or substance abuse disorder according to DSM-IV-TR criteria (excluding nicotine). Subjects should also agree to refrain from consuming abnormally high amounts of caffeine during the study.
  13. Suicidality, defined as either active suicidal plan/intent or active suicidal thoughts, in the 6 months before the Screening Visit or no lifetime suicide attempt.
  14. Blind subjects
  15. Any relation to the Sponsor, Investigator or study staff
  16. Any condition, which in the opinion of the Principal Investigator would place the subject at risk or influence the conduct of the study or interpretation of results, including (but not limited to) abnormally low intellectual capacity.
  17. Subjects who cannot fully comprehend the implications of the protocol or comply with its requirements or are capable to follow the study schedule for any reason
  18. Pregnancy, lactation or inadequate contraceptive method

    -

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
120 participants (actual)

Study arms

  • Experimental
    METADOXINE

    Eligible subjects will be randomly assigned to receive MG01CI (1,400 mg)

    Drug: Metadoxine (MG01CI)

  • Placebo comparator
    Placebo

    Eligible subjects will be randomly assigned to receive Placebo (1,400 mg)

    Drug: Metadoxine (MG01CI)

Interventions

  • DrugMetadoxine (MG01CI)

    MG01CI 1400 mg, that will be taken daily by the patients for a duration of 6 weeks.

    Also known as: Metadoxil

06

What researchers measure

Primary outcomes

  1. Conners' Adult ADHD Rating Scales (CAARS™)

    The primary efficacy endpoint is the difference in change (decrease) in CAARS (Total ADHD Symptoms Score) between the study groups. The CAARS assess the presence and severity of ADHD symptoms and behaviors in adults. Respondents are asked to report their own experiences by rating items pertaining to their behavior/problems using a 4-point Likert-style format ranging from 0 ('Not at all', 'never') to 3 ('Very much', 'very frequently'). The scale measures ADHD symptoms using a 30-item questionnaire.Total score is the sum of all the items ,min=30 Max=90

    Time frame: 6 weeks (from visit 1 baseline to visit 6)

Secondary outcomes

  1. Test of Variables of Attention (TOVA) (Change in ADHD Score From Screening to Visit 6)

    The TOVA is a computerized test that provides information about an individual's sustained attention, speed and consistency of responding, and behavioral self-regulation and executive functioning. ADHD score is a comparison of the subject's response to the CPT test to those of an ADHD group, and is reported as a Z-score. An ADHD score of -1.80 and less fits the profile of the ADHD sample. A score of more than -1.80 (more positive) does not fit the ADHD profile. When comparing ADHD scores the higher the ADHD score the better the performance.

    Time frame: 6 weeks( visit 1 baseline to visit 6)

  2. Adult ADHD Quality of Life (AAQoL)- Measuring Change in Total Score of AAQoL From Visit 1 to Visit 6

    The AAQoL scale provides a validated disease-specific measure of the impact of ADHD on quality of life.It is scored as an overall score (29 items) and four subscale scores: life productivity (11 items), psychological health (6 items), life outlook (7 items) and relationships (5 items). Individual items are scored on a five-point Likert-like scale from 'Not at all/Never' (1) to 'Extremely/Very Often' (5).

    Time frame: 6 weeks (from visit 1 baseline to visit 6)

  3. Clinical Global Impression Scale (CGI-I)Score

    The CGI is rated on a 7-point scale, with the severity of illness scale using a range of responses from 1 (normal) through to 7 (amongst the most severely ill patients). CGI-I scores range from 1 ('very much improved') through to 7 ('very much worse'). During the conduct of the study, CGI-I evaluations were not done correctly and thus data interpretation is limited.

    Time frame: 6 weeks from visit 1 baseline to visit 6

07

Results

Posted Apr 18, 2012

Participant flow

subjects recruitment was done in two medical centers Geha and Rambam during Feb 2011-June 2011.

Participant flow — Overall Study
MilestoneMETADOXINE(MG01CI)Placebo
Started6060
Completed5756
Not completed34
Withdrew: Adverse event11
Withdrew: Withdrawal by subject11
Withdrew: Physician decision01
Withdrew: Sponsor decision01
Withdrew: Non compliance10

Outcome measures

PrimaryConners' Adult ADHD Rating Scales (CAARS™)

The primary efficacy endpoint is the difference in change (decrease) in CAARS (Total ADHD Symptoms Score) between the study groups. The CAARS assess the presence and severity of ADHD symptoms and behaviors in adults. Respondents are asked to report their own experiences by rating items pertaining to their behavior/problems using a 4-point Likert-style format ranging from 0 ('Not at all', 'never') to 3 ('Very much', 'very frequently'). The scale measures ADHD symptoms using a 30-item questionnaire.Total score is the sum of all the items ,min=30 Max=90

Time frame:
6 weeks (from visit 1 baseline to visit 6)
Reported as:
Mean · units on a scale
Conners' Adult ADHD Rating Scales (CAARS™)
units on a scaleMETADOXINE(MG01CI)Placebo
Conners' Adult ADHD Rating Scales (CAARS™)-12 ± 9.69-8.93 ± 9.26
Statistical analysis
  • METADOXINE(MG01CI) vs Placebo · Median · p = 0.0093 (p value for the difference between groups in change from Screening to Termination was calculated using the median test for independent samples)
SecondaryTest of Variables of Attention (TOVA) (Change in ADHD Score From Screening to Visit 6)

The TOVA is a computerized test that provides information about an individual's sustained attention, speed and consistency of responding, and behavioral self-regulation and executive functioning. ADHD score is a comparison of the subject's response to the CPT test to those of an ADHD group, and is reported as a Z-score. An ADHD score of -1.80 and less fits the profile of the ADHD sample. A score of more than -1.80 (more positive) does not fit the ADHD profile. When comparing ADHD scores the higher the ADHD score the better the performance.

Time frame:
6 weeks( visit 1 baseline to visit 6)
Reported as:
Mean · Z score
Test of Variables of Attention (TOVA) (Change in ADHD Score From Screening to Visit 6)
Z scoreMETADOXINE(MG01CI)Placebo
Test of Variables of Attention (TOVA) (Change in ADHD Score From Screening to Visit 6)4.96 ± 8.863.01 ± 6.40
Statistical analysis
  • METADOXINE(MG01CI) vs Placebo · ANCOVA · p = 0.0195 (p value for the difference between groups in change from Screening to Termination was calculated using ANCOVA, adjusted for baseline score, gender, site and age)
SecondaryAdult ADHD Quality of Life (AAQoL)- Measuring Change in Total Score of AAQoL From Visit 1 to Visit 6

The AAQoL scale provides a validated disease-specific measure of the impact of ADHD on quality of life.It is scored as an overall score (29 items) and four subscale scores: life productivity (11 items), psychological health (6 items), life outlook (7 items) and relationships (5 items). Individual items are scored on a five-point Likert-like scale from 'Not at all/Never' (1) to 'Extremely/Very Often' (5).

Time frame:
6 weeks (from visit 1 baseline to visit 6)
Reported as:
Mean · units on a scale
Adult ADHD Quality of Life (AAQoL)- Measuring Change in Total Score of AAQoL From Visit 1 to Visit 6
units on a scaleMETADOXINE(MG01CI)Placebo
Adult ADHD Quality of Life (AAQoL)- Measuring Change in Total Score of AAQoL From Visit 1 to Visit 610.93 ± 11.15.71 ± 15.82
Statistical analysis
  • METADOXINE(MG01CI) · ANCOVA · p = 0.0093 (p value for the difference between groups in change from Screening to Termination was calculated using ANCOVA, adjusted for baseline score, gender, site and age.)
SecondaryClinical Global Impression Scale (CGI-I)Score

The CGI is rated on a 7-point scale, with the severity of illness scale using a range of responses from 1 (normal) through to 7 (amongst the most severely ill patients). CGI-I scores range from 1 ('very much improved') through to 7 ('very much worse'). During the conduct of the study, CGI-I evaluations were not done correctly and thus data interpretation is limited.

Time frame:
6 weeks from visit 1 baseline to visit 6
Reported as:
Mean · units on a scale

No measurements were reported for this outcome.

Adverse events

Collected over 8 weeks (from time of informed consent to end of study). Non-serious events are listed at a 3% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
METADOXINE(MG01CI)—1/58 (1.7%)44/58 (75.9%)
Placebo—0/59 (0%)41/59 (69.5%)
Most frequent serious events
Most frequent serious events
EventMETADOXINE(MG01CI)Placebo
AppendicitisInfections and infestations1/580/59
Neuroendocrine tumourNeoplasms benign, malignant and unspecified (incl cysts and polyps)1/580/59
Most frequent other events
Showing 10 of 19
Most frequent other events
EventMETADOXINE(MG01CI)Placebo
HeadacheNervous system disorders17/5823/59
NauseaGastrointestinal disorders10/580/59
Abdominal pain upperGastrointestinal disorders5/583/59
Oropharyngeal painRespiratory, thoracic and mediastinal disorders5/584/59
Back painMusculoskeletal and connective tissue disorders4/583/59
DysmenorrhoeaReproductive system and breast disorders2/584/59
DizzinessNervous system disorders3/581/59
FatigueGeneral disorders3/581/59
Initial insomniaPsychiatric disorders3/580/59
AstheniaGeneral disorders2/580/59

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)METADOXINE(MG01CI)PlaceboTotal
<=18 years000
Between 18 and 65 years6060120
>=65 years000
Sex: Female, Male
Sex: Female, Male(Participants)METADOXINE(MG01CI)PlaceboTotal
Female262147
Male343973
Region of Enrollment
Region of Enrollment(participants)METADOXINE(MG01CI)PlaceboTotal
Israel6060120
08

Study locations

2 sites
  • Cognitive Neurology unit Rambam Health Care Campus
    Haifa, Israel
  • ADHD Unit, Geha Mental Health Center
    Petah Tikva,, Israel
09

References and documents

Publications

  • Manor I, Newcorn JH, Faraone SV, Adler LA. Efficacy of metadoxine extended release in patients with predominantly inattentive subtype attention-deficit/hyperactivity disorder. Postgrad Med. 2013 Jul;125(4):181-90. doi: 10.3810/pgm.2013.07.2689. PubMed 23933905 ↗
  • Manor I, Ben-Hayun R, Aharon-Peretz J, Salomy D, Weizman A, Daniely Y, Megiddo D, Newcorn JH, Biederman J, Adler LA. A randomized, double-blind, placebo-controlled, multicenter study evaluating the efficacy, safety, and tolerability of extended-release metadoxine in adults with attention-deficit/hyperactivity disorder. J Clin Psychiatry. 2012 Dec;73(12):1517-23. doi: 10.4088/JCP.12m07767. PubMed 23290324 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 20, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01243242
Lead sponsor
Alcobra Ltd.
Responsible party
Sponsor
First posted
Nov 18, 2010
Start date
Feb 2011
Primary completion
Aug 2011
Completion
Sep 2011
Results posted
Apr 18, 2012
Last update
Apr 20, 2012

Study contacts

Iris Manor, MD
principal investigator · Geha MC, Israel

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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