Clinical trial Recruiting at 3 sites Phase 2 Interventional Ages 18 and up

Combined Thiamine and Biotin Treatment for Huntington's Disease

Official title: Multicentric Trial on the Use of Combined Therapy of Thiamine and Biotine in Patients With Huntington´s Disease

Run by Fundación Pública Andaluza para la gestión de la Investigación en Sevilla · NCT04478734 · Data updated 2026-11-12

This study is testing if a combination of thiamine and biotin can help slow down symptoms in people with mild to moderate Huntington's disease.

More Huntington Disease trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment24 (estimated)
SponsorFundación Pública Andaluza para la gestión de la Investigación en Sevilla
Academic / other
Locations3 sites (San Sebastián, San Sebastian and 2 other locations)
StatusRecruiting
StartedApril 12, 2023
Main results expectedJune 30, 2025
Study endsDecember 30, 2025
Registry record updatedFebruary 25, 2025
Trial IDNCT04478734 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults with manifest Huntington's disease exhibiting motor symptoms and genetic confirmation of the condition.

Probably not a fit

Patients with significant medical comorbidities or those who are pregnant or lactating may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This trial evaluates the safety and tolerability of combined oral thiamine and biotin therapy in patients with mild to moderate Huntington's disease. The study aims to assess the biological effects of the treatment by measuring thiamine monophosphate levels in cerebrospinal fluid over a one-year follow-up period. Participants will undergo periodic clinical examinations and monitoring for adverse effects, alongside analytical assessments of thiamine levels in both cerebrospinal fluid and blood. The ultimate goal is to determine if this combination therapy can modify the disease course or slow symptom progression in early-stage Huntington's disease patients.

Why it matters

Potential benefit: If successful, this treatment could potentially slow the progression of Huntington's disease symptoms in early-stage patients.

How similar studies have gone: While this approach is novel, other studies have explored thiamine and biotin individually, but combined therapy in this context is less common.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients of legal age with manifest Huntington's disease with motor symptoms (chorea, dystonia or bradykinesia) and/or neuropsychiatric; and genetic confirmation of a number of repetitions of the cytosine-adenine-guanine trinucleotide (CAG triplet) in the HTT gene (coding for HTT) greater than or equal to 39
* Patients should be capable of giving informed consent and attending the planned visit of the study.
* Women of childbearing age should obtain a negative result in the serum or urine pregnancy test at the screening visit. They must also accept the use of appropriate contraceptive methods during the course of the clinical trial and men who have a partner of childbearing age, accept the use of contraceptive methods

Exclusion Criteria:

* Medical comorbidities considered clinically significant by the clinical judgment of the investigators.
* Pregnancy or lactation
* Patients with HD dependents on the basic routine daily life activities (UHDRS TFC \< 7) or a severe cognitive decline.
* Active psychosis at the moment of the screening evaluation.
* Severe renal failure.
* Patients previously treated with thiamine and/or biotin or enrolled in other HD clinical trial with oligonucleotide antisense (IONIS-HTTRX (RG6042).

Where it's running

  • Hospital Universitario de San Sebastián
    San Sebastián, San Sebastian, Spain
    Recruiting
  • Virgen del Rocío Hospital
    Seville, Seville, Spain
    Recruiting
  • Hospital Ramón y Cajal
    Madrid, Spain
    Recruiting

Study contacts

  • Principal investigator: Clara M. Rosso Fernández — Virgen del Rocío University Hospital Research and Clinical Trials Unit
  • Study coordinator: Pablo Mir Rivera, MD/PhD
  • Email: pmir@us.es
  • Phone: +34 955923039

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.