Benign Essential BlepharospasmPhase 4NCT06195241

Effects of DaxibotulinumtoxinA for Blepharospasm and Hemifacial Spasm

A Phase 4 study testing DaxibotulinumtoxinA in people with Benign Essential Blepharospasm and Hemifacial Spasm, run by Montefiore Medical Center at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts

Official record

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Trial summary

The goal of this clinical trial is to test the effects of DaxibotulinumtoxinA-Lanm (Daxxify) in patients with benign essential blepharospasms (BEB) and hemifacial spasms (HFS). The main questions to answer: 1. Read more about this study

Who is it for?: Ages 18 years and older
Conditions the study is for: Benign Essential Blepharospasm, Hemifacial Spasm
What is being tested?: DaxibotulinumtoxinA
Type of treatment: Injection or infusion
Could I receive a placebo?: No, everyone receives an active treatment
How many people: 40 participants
Where: 1 siteUnited States
Study dates: 11 Feb 2025to Mar 2027
Phase: Phase 4
Are there results?: Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

Ages 18 years and older
All sexes
No healthy volunteers
Adult, Older adult

Who may be able to join

Benign essential blepharospasm (BEB) or hemifacial spasm (HFS) as diagnosed by an ophthalmologist.
No known neurologic or neuromuscular systematic medications.
No history or surgical intervention for BEB or HFS.
Patients are required to have a minimum score of 4 out of 8 on the modified Jankovic Rating Scale for Severity/Frequency.

Who cannot join

Patients will be excluded if age < 18, are pregnant, are non-willing, or have contra-indications to botulinum toxin.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Isaac M Weber, BA contact

347-706-0146

moshe.weber@einsteinmed.edu

United States1 site, 1 recruiting

Montefiore Medical Center
The Bronx, New York, 10466
Anne Barmettler, MD, 978-886-7122, abarmett@montefiore.org
Isaac M Weber, BA, moshe.weber@einsteinmed.edu
Recruiting

Other trials in United States

About this study

Official title: The Safety and Efficacy of DaxibotulinumtoxinA-Lanm for Benign Essential Blepharospasm and Hemifacial Spasm

Is there clinically significant difference (measured by Jankovic Rating Scale (JRS) score from base to peak efficacy) for patients with BEB and HFS treated with Daxxify?
What percentage of patients achieve a clinical response?

Participants historically treated with Botox for either BEB or HFS will be crossed over to Daxxify treatment in order to serve as their own control and examine the efficacy of Daxxify.

Read the detailed description

This will be a single-arm, crossover study, in which each patient is their own historical control using a 2:1 conversion ratio of Daxxify to Botox units. Study participants will be selected through the electronic medical records of ophthalmologists at Montefiore Medical Center. Medical documentation on each patient will include information on age, sex, race, Benign Essential Blepharospasm (BEB) diagnosis year and duration, Hemifacial Spasms (HFS) diagnosis year and duration, and past treatments.

The immediate effects (desired or undesired) of Daxxify observed within 48-72 hours, will be defined as (1) complete relief of spasms (2) partial relief to a tolerable level (3) mild to moderate ocular irritation (4) ptosis.

Overall efficacy will be evaluated using the base to peak efficacy (recorded in changes to Jankovic Rating Scale (JRS) scores) and be defined as (1) excellent (resolution of signs and symptoms, only requiring injections > 5-6 months (2) moderate (improvement in signs and symptoms but requiring repeated injections within < 5 months (3) poor (no improvement in signs and symptoms).

Adverse side effects will be documented, and Daxxify will be discontinued in any patients who develop significant side effects that outweigh the benefits.

Conditions: Benign Essential Blepharospasm, Hemifacial Spasm
Being tested: DaxibotulinumtoxinA
Medical subject headings: Benign essential blepharospasm, Hemifacial Spasm

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

DaxibotulinumtoxinADrug
Also called Daxxify
Patients with Benign Essential Blepharospasm (BEB) or Hemifacial spasms (HFS) will be treated with DaxibotulinumtoxinA-Lanm (Daxxify) using a 2:1 conversion rate of Daxxify-to-Botox units.
BEB dosing: participants will receive Daxxify at 10 sites using a 2:1 conversion ratio of Daxxify to Botox units. The location of these injections are in the superficial dermis in the sites typical for BEB.
HFS dosing: participants will then receive Daxxify at 8 sites using a 2:1 conversion ratio of Daxxify to Botox units. The location of these injections are in the superficial dermis in the sites typical for HFS.
Patients will be followed monthly to measure duration and efficacy of the Daxxify. Patients will receive their single dose of Daxxify at the same time point in which they would have normally received their next Botox treatment, without a washout period.

Study groups in NCT06195241
Study group	Role	What they receive
Benign Essential Blepharospasm or Hemifacial Spasm	Experimental	Patients with either Benign Essential Blepharospasms or Hemifacial Spasms in accordance with Eligibility criteria. Receives: Drug: DaxibotulinumtoxinA

What is being measured

The primary outcome is the main question the study is designed to answer.

Therapeutic Response based on the modified Jankovic Rating Scale
Therapeutic response of Daxxify will be measured as the significant difference between the baseline to peak efficacy scores using the modified Jankovic rating scale (JRS). The JRS scale is a validated physician rating scale that consists of two subscales: blepharospasm (or hemifacial spasm) severity and blepharospasm (or hemifacial spasm) frequency. Each subscale is based on a 5-point scale ranging from 0-4, where 0 indicates no symptoms or frequency and 4 indicates the most severe or frequent symptoms. Overall scores will be reported as the sum of the two subscales of severity and frequency of symptoms and will range from 0-8. The modified JRS will be modified slightly to include hemifacial spasm as opposed to just including blepharospasm. Basic descriptive statistics will be used to summarize and report therapeutic response. The Wilcoxon signed-ranked test will be used to analyze paired ordinal data gathered from the JRS scores.
Measured: Prior to treatment at beginning of study, 1 month post-treatment, 3 months post-treatment, and on a monthly basis after 3-month timepoint until symptom free, up to a maximum of 9 months

Secondary outcomes (3)

Waning of Effect
Waning of effect will be assessed by quantifying the patient-reported time, in months, to noticing a loss of peak treatment effect (i.e., start of waning). The number of months until noticing a loss of peak treatment effect will be summarized and reported using basic descriptive statistics.
Measured: 1 month post-treatment, 3 months post-treatment, and on a monthly basis after 3-month timepoint until symptoms return to baseline, up to a maximum of 9 months
Loss of Efficacy
Loss of efficacy will be assessed by quantifying the patient-reported time, in months, to noticing a complete loss of efficacy (return to baseline symptom status). The number of months to complete loss of efficacy will be summarized and reported using basic descriptive statistics.
Measured: 1 month post-treatment, 3 months post-treatment, and on a monthly basis after 3-month timepoint until symptoms return to baseline, up to a maximum of 9 months
Incidence Rate of Treatment Failure
Participant incidence rate of treatment failure will be measured as a lack of response or primary non-response (defined as a < 25% response from the first injection and subsequent injections of increasing dosages) to medication up to four weeks later for either benign essential blepharospasm or hemifacial spasm. Incidence rate of treatment failure will be defined as the percentage of participants who did not respond to treatment and will be summarized using basic descriptive statistics.
Measured: Up to four weeks post treatment

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

11 Feb 2025Mar 2027

First posted8 Jan 2024
Study start11 Feb 2025
Primary completionMar 2027 (estimated)
Study completionMar 2027 (estimated)

Resources

Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
Publications (9)Papers the sponsor has linked to this study.
Other trials for Benign Essential BlepharospasmStudies of the same condition, open and under way.
More trials run by Montefiore Medical CenterThe sponsor's other registered studies.
What the trial phases meanHow a treatment moves from first tests in people to approval.

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design

Study type: Interventional
Phase: Phase 4
Primary purpose: Treatment
Allocation: Not applicable
Intervention model: Single group
Model description: This will be a single-arm, crossover study, in which each patient is their own historical control using a 2:1 conversion ratio of Daxxify to Botox units.
Masking: None (open label)
Enrolment: 40 participants (estimated)

IDs, dates and publications

ClinicalTrials.gov ID: NCT06195241
Sponsor's protocol ID: 2023-15151
Other IDs: 2023-IST-DAXI-000186, 2023
Status last verified: Apr 2026
First submitted: 22 Dec 2023
Last updated: 23 Apr 2026
Results posted: No
Data monitoring committee: Yes
FDA-regulated drug: Yes
FDA-regulated device: No
Individual data sharing: No

Publications

Anwar MS, Zafar H. Efficacy of botulinum toxin in benign essential Blepharospasm: Desirable & undesirable effects. Pak J Med Sci. 2013 Nov;29(6):1389-93. doi: 10.12669/pjms.296.3853.
PubMed 24550960
Carruthers JD, Fagien S, Joseph JH, Humphrey SD, Biesman BS, Gallagher CJ, Liu Y, Rubio RG; SAKURA 1 and SAKURA 2 Investigator Group; SAKURA 1 and SAKURA 2 Investigator Group includes the following. DaxibotulinumtoxinA for Injection for the Treatment of Glabellar Lines: Results from Each of Two Multicenter, Randomized, Double-Blind, Placebo-Controlled, Phase 3 Studies (SAKURA 1 and SAKURA 2). Plast Reconstr Surg. 2020 Jan;145(1):45-58. doi: 10.1097/PRS.0000000000006327.
PubMed 31609882
Dutton JJ, Fowler AM. Botulinum toxin in ophthalmology. Surv Ophthalmol. 2007 Jan-Feb;52(1):13-31. doi: 10.1016/j.survophthal.2006.10.003.
PubMed 17212988
Hellman A, Torres-Russotto D. Botulinum toxin in the management of blepharospasm: current evidence and recent developments. Ther Adv Neurol Disord. 2015 Mar;8(2):82-91. doi: 10.1177/1756285614557475.
PubMed 25922620
Okumus S, Coskun E, Erbagci I, Tatar MG, Comez A, Kaydu E, Yayuspayi R, Gurler B. Botulinum toxin injections for blepharospasm prior to ocular surgeries. Clin Ophthalmol. 2012;6:579-83. doi: 10.2147/OPTH.S30277. Epub 2012 May 3.
PubMed 22654489
Solish N, Carruthers J, Kaufman J, Rubio RG, Gross TM, Gallagher CJ. Overview of DaxibotulinumtoxinA for Injection: A Novel Formulation of Botulinum Toxin Type A. Drugs. 2021 Dec;81(18):2091-2101. doi: 10.1007/s40265-021-01631-w. Epub 2021 Nov 17.
PubMed 34787840
Tambasco N, Filidei M, Nigro P, Parnetti L, Simoni S. Botulinum Toxin for the Treatment of Hemifacial Spasm: An Update on Clinical Studies. Toxins (Basel). 2021 Dec 9;13(12):881. doi: 10.3390/toxins13120881.
PubMed 34941718
Wabbels B, Yaqubi A. Validation of a new hemifacial spasm grading questionnaire (HFS score) assessing clinical and quality of life parameters. J Neural Transm (Vienna). 2021 Jun;128(6):793-802. doi: 10.1007/s00702-021-02343-x. Epub 2021 May 8.
PubMed 33963897
Bellows S, Jankovic J. Immunogenicity Associated with Botulinum Toxin Treatment. Toxins (Basel). 2019 Aug 26;11(9):491. doi: 10.3390/toxins11090491.
PubMed 31454941

Study at a glance

From the registry record, last updated by the sponsor on 23 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.

Official title: The Safety and Efficacy of DaxibotulinumtoxinA-Lanm for Benign Essential Blepharospasm and Hemifacial Spasm
ClinicalTrials.gov ID: NCT06195241
Acronym / sponsor ID: 2023-15151
Conditions: Benign Essential Blepharospasm, Hemifacial Spasm
Phase: Phase 4
Study type: Interventional
Recruitment status: Recruiting
Enrolment: 40 participants (estimated)
Lead sponsor: Montefiore Medical CenterUniversity, hospital or other
Collaborators: Revance Therapeutics, Inc.
Study start: 11 Feb 2025 (actual)
Primary completion: Mar 2027 (estimated)
Study completion: Mar 2027 (estimated)
First posted: 8 Jan 2024 (actual)
Results: Not posted in the source record

Clinical summary

The research question as the sponsor registered it. This describes what the study plans to test, not what it found.

Is there clinically significant difference (measured by Jankovic Rating Scale (JRS) score from base to peak efficacy) for patients with BEB and HFS treated with Daxxify?
What percentage of patients achieve a clinical response?

Participants historically treated with Botox for either BEB or HFS will be crossed over to Daxxify treatment in order to serve as their own control and examine the efficacy of Daxxify.

Detailed description

Adverse side effects will be documented, and Daxxify will be discontinued in any patients who develop significant side effects that outweigh the benefits.

Study design

Primary purpose: Treatment
Allocation: Not applicable
Intervention model: Single group
Masking: None (open label)
Number of arms: 1
Model description: This will be a single-arm, crossover study, in which each patient is their own historical control using a 2:1 conversion ratio of Daxxify to Botox units.

Arm	Type	Receives
Benign Essential Blepharospasm or Hemifacial Spasm	Experimental	Drug: DaxibotulinumtoxinAPatients with either Benign Essential Blepharospasms or Hemifacial Spasms in accordance with Eligibility criteria.

Who may qualify

Ages: 18 years and older
Sex: All
Healthy volunteers: Not accepted
Age groups: Adult, Older adult

Key inclusion criteria (4 listed)

Benign essential blepharospasm (BEB) or hemifacial spasm (HFS) as diagnosed by an ophthalmologist.
No known neurologic or neuromuscular systematic medications.
No history or surgical intervention for BEB or HFS.
Patients are required to have a minimum score of 4 out of 8 on the modified Jankovic Rating Scale for Severity/Frequency.

Key exclusion criteria (1 listed)

Patients will be excluded if age < 18, are pregnant, are non-willing, or have contra-indications to botulinum toxin.

Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.

Interventions

Intervention	Type	Arms
DaxibotulinumtoxinAAlso: DaxxifyPatients with Benign Essential Blepharospasm (BEB) or Hemifacial spasms (HFS) will be treated with DaxibotulinumtoxinA-Lanm (Daxxify) using a 2:1 conversion rate of Daxxify-to-Botox units. BEB dosing: participants will receive Daxxify at 10 sites using a 2:1 conversion ratio of Daxxify to Botox units. The location of these injections are in the superficial dermis in the sites typical for BEB. HFS dosing: participants will then receive Daxxify at 8 sites using a 2:1 conversion ratio of Daxxify to Botox units. The location of these injections are in the superficial dermis in the sites typical for HFS. Patients will be followed monthly to measure duration and efficacy of the Daxxify. Patients will receive their single dose of Daxxify at the same time point in which they would have normally received their next Botox treatment, without a washout period.	Drug	Benign Essential Blepharospasm or Hemifacial Spasm

Primary outcome

Therapeutic Response based on the modified Jankovic Rating Scale
Time frame: Prior to treatment at beginning of study, 1 month post-treatment, 3 months post-treatment, and on a monthly basis after 3-month timepoint until symptom free, up to a maximum of 9 months
Therapeutic response of Daxxify will be measured as the significant difference between the baseline to peak efficacy scores using the modified Jankovic rating scale (JRS). The JRS scale is a validated physician rating scale that consists of two subscales: blepharospasm (or hemifacial spasm) severity and blepharospasm (or hemifacial spasm) frequency. Each subscale is based on a 5-point scale ranging from 0-4, where 0 indicates no symptoms or frequency and 4 indicates the most severe or frequent symptoms. Overall scores will be reported as the sum of the two subscales of severity and frequency of symptoms and will range from 0-8. The modified JRS will be modified slightly to include hemifacial spasm as opposed to just including blepharospasm. Basic descriptive statistics will be used to summarize and report therapeutic response. The Wilcoxon signed-ranked test will be used to analyze paired ordinal data gathered from the JRS scores.

3 secondary outcomes

Waning of Effect
Time frame: 1 month post-treatment, 3 months post-treatment, and on a monthly basis after 3-month timepoint until symptoms return to baseline, up to a maximum of 9 months
Loss of Efficacy
Time frame: 1 month post-treatment, 3 months post-treatment, and on a monthly basis after 3-month timepoint until symptoms return to baseline, up to a maximum of 9 months
Incidence Rate of Treatment Failure
Time frame: Up to four weeks post treatment

Results and safety

This study is still under way. Results are not available in the source record yet.

Research links

Official record on ClinicalTrials.govLast updated by the sponsor 23 Apr 2026.
Background: PubMed 24550960Anwar MS, Zafar H. Efficacy of botulinum toxin in benign essential Blepharospasm: Desirable & undesirable effects. Pak J Med Sci. 2013 Nov;29(6):1389-93. doi: 10.12669/pjms.296.3853.
Background: PubMed 31609882Carruthers JD, Fagien S, Joseph JH, Humphrey SD, Biesman BS, Gallagher CJ, Liu Y, Rubio RG; SAKURA 1 and SAKURA 2 Investigator Group; SAKURA 1 and SAKURA 2 Investigator Group includes the following. DaxibotulinumtoxinA for Injection for the Treatment of Glabellar Lines: Results from Each of Two Multicenter, Randomized, Double-Blind, Placebo-Controlled, Phase 3 Studies (SAKURA 1 and SAKURA 2). Plast Reconstr Surg. 2020 Jan;145(1):45-58. doi: 10.1097/PRS.0000000000006327.
Background: PubMed 17212988Dutton JJ, Fowler AM. Botulinum toxin in ophthalmology. Surv Ophthalmol. 2007 Jan-Feb;52(1):13-31. doi: 10.1016/j.survophthal.2006.10.003.
Background: PubMed 25922620Hellman A, Torres-Russotto D. Botulinum toxin in the management of blepharospasm: current evidence and recent developments. Ther Adv Neurol Disord. 2015 Mar;8(2):82-91. doi: 10.1177/1756285614557475.
Background: PubMed 22654489Okumus S, Coskun E, Erbagci I, Tatar MG, Comez A, Kaydu E, Yayuspayi R, Gurler B. Botulinum toxin injections for blepharospasm prior to ocular surgeries. Clin Ophthalmol. 2012;6:579-83. doi: 10.2147/OPTH.S30277. Epub 2012 May 3.
Background: PubMed 34787840Solish N, Carruthers J, Kaufman J, Rubio RG, Gross TM, Gallagher CJ. Overview of DaxibotulinumtoxinA for Injection: A Novel Formulation of Botulinum Toxin Type A. Drugs. 2021 Dec;81(18):2091-2101. doi: 10.1007/s40265-021-01631-w. Epub 2021 Nov 17.
Background: PubMed 34941718Tambasco N, Filidei M, Nigro P, Parnetti L, Simoni S. Botulinum Toxin for the Treatment of Hemifacial Spasm: An Update on Clinical Studies. Toxins (Basel). 2021 Dec 9;13(12):881. doi: 10.3390/toxins13120881.
Background: PubMed 33963897Wabbels B, Yaqubi A. Validation of a new hemifacial spasm grading questionnaire (HFS score) assessing clinical and quality of life parameters. J Neural Transm (Vienna). 2021 Jun;128(6):793-802. doi: 10.1007/s00702-021-02343-x. Epub 2021 May 8.
Background: PubMed 31454941Bellows S, Jankovic J. Immunogenicity Associated with Botulinum Toxin Treatment. Toxins (Basel). 2019 Aug 26;11(9):491. doi: 10.3390/toxins11090491.
DailyMed - DAXXIFY- botulinum toxin type A injection, powder, lyophilized, for solution. U.S. National Library of Medicine.Link provided by the sponsor.
Individual participant dataSharing planned: No

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Referral and contact

AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.

Isaac M Weber, BA contact

347-706-0146

moshe.weber@einsteinmed.edu

Anne Barmettler, MD principal investigator

Montefiore Medical Center/Albert Einstein College of Medicine

1 site in 1 country: see every site and its status.

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing DaxibotulinumtoxinA in people with Benign Essential Blepharospasm and Hemifacial Spasm, run by Montefiore Medical Center at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 23 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Isaac M Weber, BA (347-706-0146, moshe.weber@einsteinmed.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Therapeutic Response based on the modified Jankovic Rating Scale (time frame: Prior to treatment at beginning of study, 1 month post-treatment, 3 months post-treatment, and on a monthly basis after 3-month timepoint until symptom free, up to a maximum of 9 months). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06195241, which also lists 9 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Apr 2026; AzTrials last refreshed its copy on 8 Nov 2026.