Tipepidine in Children With Attention Deficit/Hyperactivity Disorder (AD/HD): a Double-blind, Placebo-controlled Trial

Chiba University

Status and phase: Completed; Phase 2; Phase 1

Conditions: Attention Deficit and Disruptive Behavior Disorders; Attention Deficit Disorder With Hyperactivity Disease; Hyperkinesis

Treatments: Drug: Tipepidine Hibenzate; Drug: Placebo

Study type: Interventional

Funder types: Other

Identifiers

NCT02305134

UMIN000015748 (Other Identifier)

G26023

Details and patient eligibility

About

Tipepidine (3-[di-2-thienylmethylene]-1-methylpiperidine) has been used solely as a nonnarcotic antitussive in Japan since 1959. The safety of tipepidine in children and adults has already been established. It is reported that tipepidine inhibits G-protein-coupled inwardly rectifying potassium (GIRK)-channel currents. The inhibition of GIRK channels by tipepidine is expected to modulate the level of monoamines in the brain. We put forward the hypothesis that tipepidine can improve attention deficit/hyperactivity disorder (ADHD) symptoms by modulating monoaminergic neurotransmission through the inhibition of GIRK channels. The purpose of this double-blind, placebo-controlled trial is to confirm whether treatment with tipepidine can improve symptoms in pediatric patients with ADHD.

Full description

Tipepidine (3-[di-2-thienylmethylene]-1-methylpiperidine) has been used solely as a nonnarcotic antitussive in Japan since 1959. The safety of tipepidine in children and adults has already been established. It is reported that tipepidine inhibits G-protein-coupled inwardly rectifying potassium (GIRK)-channel currents. The inhibition of GIRK channels by tipepidine is expected to modulate the level of monoamines in the brain. We put forward the hypothesis that tipepidine can improve attention deficit/hyperactivity disorder (ADHD) symptoms by modulating monoaminergic neurotransmission through the inhibition of GIRK channels. The purpose of this double-blind, placebo-controlled trial is to confirm whether treatment with tipepidine can improve symptoms in pediatric patients with ADHD.

See our previous open trial, An Open Study of Tipepidine Hibenzate in Patients With Attention Deficit Hyperactivity Disorder (ADHD) http://clinicaltrials.gov/show/NCT01835093

Enrollment: 21 patients

Sex: All

Ages: 6 to 17 years old

Volunteers: No Healthy Volunteers

Inclusion and exclusion criteria

[Inclusion Criteria]

1. Diagnosis of attention deficit hyperactivity disorder besed on DSM-5 criteria.
2. Scores of 20 or higher in ADHD-RS (physician evaluation) total score.
3. currently is an outpatient at Chiba University Hospital Department of Psychiatry or Child Psychiatry.
4. currently receiving no medications for ADHD (atomoxetine, methylphenidate) treatment for the previous 4 weeks prior to enrollment in this study.
5. currently receiving no medications of antidepressants, mood stabilizers and the antipsychotics treatment for the previous 4 weeks prior to enrollment in this study.
6. currently receiving no medications of GIRK channel antagonist (tipepidine, cloperastine, caramiphen) treatment for the previous 4 weeks prior to enrollment in this study.
7. Ages 6 - 17, male or female
8. Provision of written informed consent by patients and parents or guardian.
9. must be able to swallow capsuled medicine.

[Exclusion Criteria]

1. History of allergic reaction or hypersensitivity to tipepidine hibenzate.
2. Patients who have not been informed of having the disease at the time of informed consent.
3. Diagnosis of any of the following diseases based on the DSM-5 criteria. Autism Spectrum Disorder, Schizophrenia Spectrum and Other Psychotic Disorders, Neurocognitive Disorders, Substance Related and Addictive Disorders, Feeding and Eating Disorders, Personality Disorders, Paraphilic Disorders.
4. currently receiving medications for ADHD (atomoxetine, methylphenidate) treatment for the previous 4 weeks prior to enrollment in this study.
5. currently receiving medications of antidepressants, mood stabilizers and the antipsychotics treatment for the previous 4 weeks prior to enrollment in this study.
6. currently receiving medications of GIRK channel antagonist (tipepidine, cloperastine, caramiphen) treatment for the previous 4 weeks prior to enrollment in this study.
7. Somatic disorder which requires severe body management or severe meal management.
8. participating in another clinical trial within 3 months prior to enrollment into this study. (except for observation study without intervention).
9. planning change of treatment because of unstable neurological manifestations or somatic symptoms.
10. History of suicidal ideation within the past year.
11. pregnant or nursing, or intending to become pregnant or to start breastfeeding during the study.
12. Other clinically significant reasons for exclusion by investigators.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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21 participants in 2 patient groups, including a placebo group

Tipepidine Hibenzate

Active Comparator group

Description:

Tipepidine is taken orally at 30 mg/day (10 mg after breakfast, 10 mg after supper, and 10 mg before bedtime), for 4 weeks.

Treatment:

Drug: Tipepidine Hibenzate

Placebo

Placebo Comparator group

Description:

Placebo is taken orally after breakfast, after supper, and before for 4 weeks.

Treatment:

Drug: Placebo