PRidopidine's Outcome On Function in Huntington Disease, PROOF- HD
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ClinicalTrials.gov Identifier: NCT04556656 |
Recruitment Status :
Active, not recruiting
First Posted : September 21, 2020
Last Update Posted : December 13, 2022
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Condition or disease | Intervention/treatment | Phase |
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Huntington Disease | Drug: Pridopidine Drug: Placebo | Phase 3 |
This is a phase 3, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of pridopidine 45 mg BID in patients with early stage HD.
Eligible patients who completed the Main Study (65 to 78 weeks) will have the option to enroll into an open-label extension.
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 499 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Parallel Arm, Multicenter Study Evaluating the Efficacy and Safety of Pridopidine in Patients With Early Stage of Huntington Disease |
Actual Study Start Date : | October 16, 2020 |
Estimated Primary Completion Date : | March 3, 2023 |
Estimated Study Completion Date : | April 7, 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: Pridopidine
45 mg pridopidine twice daily (BID)
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Drug: Pridopidine
Pridopidine hard gelatin capsule |
Placebo Comparator: Placebo
Matching placebo
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Drug: Placebo
Pridopidine-matching placebo hard gelatin capsule |
- Change from baseline in the Unified Huntington Disease Rating Scale-Total functional capacity (UHDRS-TFC) score [ Time Frame: Baseline, 65 weeks ]

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 25 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
INCLUSION CRITERIA MAIN STUDY
- Diagnosis of HD based on clinical features and the presence of ≥36 CAG repeats in the huntingtin gene
- Diagnostic confidence level (DCL) of 4
- Adult-onset HD with onset of signs and symptoms ≥18 years of age
- Stage 1 or Stage 2 HD, defined as a UHDRS-TFC score of ≥7, at screening
EXCLUSION CRITERIA
- Use of pridopidine within 12 months before the baseline visit.
- Gene therapy at any time
- Any serious medical condition or clinically significant laboratory, or vital sign abnormality that precludes the patient's safe participation in and completion of the study e.g. significant heart disease within 12 weeks before baseline or history of certain cardiac arrhythmias
- History of epilepsy or seizures within the last 5 years
- Pregnant or breastfeeding, or intention to become pregnant during the study

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04556656

Responsible Party: | Prilenia |
ClinicalTrials.gov Identifier: | NCT04556656 |
Other Study ID Numbers: |
PL101-HD301 2020-002822-10 ( EudraCT Number ) |
First Posted: | September 21, 2020 Key Record Dates |
Last Update Posted: | December 13, 2022 |
Last Verified: | December 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Huntington Disease |
Huntington Disease Basal Ganglia Diseases Brain Diseases Central Nervous System Diseases Nervous System Diseases Movement Disorders Heredodegenerative Disorders, Nervous System Neurodegenerative Diseases |
Genetic Diseases, Inborn Cognition Disorders Neurocognitive Disorders Mental Disorders Dementia Chorea Dyskinesias |