Charcot Marie Tooth DiseasePhase 2NCT02561702
Mexiletine for Muscle Cramps in Charcot Marie Tooth Disease
A Phase 2 study testing Mexiletine in people with Charcot Marie Tooth Disease, run by University of Rochester at 1 site in United States.
Trial summary
Charcot Marie Tooth Disease is a family of inherited peripheral neuropathies, with over 70 causative genes identified to date.1-4 Muscle cramps are frequent in CMT, affecting up to 85% of patients with some subtypes of CMT. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Charcot Marie Tooth Disease
- What is being tested?
- Mexiletine
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 4 participants
- Where
- 1 siteUnited States
- Study dates
- Sep 2015to 31 Dec 2016
- Phase
- Phase 2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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
- The subject has known CMT, previously diagnosed by a neurologist with subspeciality expertise in neuromuscular disorders/peripheral neuropathy. The diagnosis of CMT relies on a combination of clinical history (including family history), neurological examination electrophysiological features, and prior genetic testing results.
- The subject is at least 18 years old, and has signed the Informed Consent Form.
- The subject is ambulatory (cane, walker, orthoses allowed).
- The subject has experienced muscle cramps and has known provokable hamstring or calf muscle cramps on MVC.
- The subject has a reliable method of birth control (if a female subject of child bearing potential). Reliable birth control is defined as Hormonal contraception Intrauterine contraception/device Any two barrier methods (combination of male or female condom with diaphragm sponge or cervical cap) together with spermicidal foam/gel/film/cream/suppository True abstinence
Who cannot join
- The subject has a known neuropathy from another source (e.g., diabetes, drug induced, alcohol, etc.).
- The subject has an untreated medical disorder known to predispose to muscle cramps
- The subject is pregnant or nursing, has a known mexiletine allergy or has taken mexiletine in the past 12 weeks.
- The subject is participating in another therapeutic trial.
- The subject has second or 3rd degree heart block, atrial flutter/fibrillation, ventricular arrhythmias, or is receiving treatment of a cardiac arrhythmia.
- The subject is currently taking another agent for muscle cramps or a muscle relaxant (e.g., benzodiazepine, baclofen, tizanidine, soma, meprobromate).
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- The subject is on another sodium channel blocker or medication that precludes administration of mexiletine.
- The subject has known diabetes mellitus, liver or kidney disease requiring ongoing treatment, untreated thyroid dysfunction, symptomatic cardiomyopathy, or symptomatic coronary artery disease.
- The subject, in the opinion of the investigator, is unsuitable for enrollment for any other reason
Trial locations and contacts
1 site in 1 country.
About this study
Charcot Marie Tooth Disease is a family of inherited peripheral neuropathies, with over 70 causative genes identified to date.1-4 Muscle cramps are frequent in CMT, affecting up to 85% of patients with some subtypes of CMT. These cramps impact quality of life and have been identified as an important therapeutic target for clinical trials in CMT.1-4 There is no FDA approved treatment for muscle cramps.5 Mexiletine is a sodium channel blocker approved for treatment of arrhythmias. As a sodium channel blocker, mexiletine offers the promise of effective therapy for muscle cramps.
Read the detailed description
This study will provide data on the short term efficacy of oral mexiletine in helping to prevent muscle cramps in adults with CMT. The study will also assess the short-term safety and tolerability of low dose mexiletine in adults with CMT.
- Conditions
- Charcot Marie Tooth Disease
- Being tested
- Placebo, Mexiletine
- Medical subject headings
- Charcot-Marie-Tooth Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
PlaceboOther
Also called lactose powder
240 mg lactose powder in a size 3 capsule taken by mouth 3 times daily for 5-7 days
MexiletineDrug
150 mg Mexiletine taken by mouth in capsule form 3 times daily for 5-7 days
| Study group | Role | What they receive |
|---|---|---|
| Mexiletine first/placebo second | Experimental | Participants will receive 150 mg of mexiletine by mouth 3 times daily for 5-7 days followed by 7 day washout period and 5-7 days of placebo (240 mg of lactose powder) taken by mouth 3 times daily Receives: Other: Placebo; Drug: Mexiletine |
| placebo first/mexiletine second | Experimental | Participants will receive placebo (240 mg of lactose powder) taken by mouth 3 times daily for 5-7 days followed by 7 day washout period and 5-7 days of 150 mg of mexiletine by mouth 3 times daily Receives: Other: Placebo; Drug: Mexiletine |
What is being measured
The primary outcome is the main question the study is designed to answer.
Number of Participants With a Decrease in Cramp Duration
Participant will be evaluated for muscle cramps 120 minutes following a single dose of oral mexiletine. The Clinical Evaluator applied pressure to provoke hamstring cramps bilaterally, one at a time 2 hours after dose. The cramp duration in seconds of the right hamstring was used.
Measured: 120 minutes
Number of Participants With a Decrease in Cramp Intensity
Participant will be evaluated for muscle cramps 120 minutes following a single dose of oral mexiletine. The Clinical Evaluator applied pressure to provoke hamstring cramps bilaterally, one at a time 2 hours after dose. The cramp intensity of the right hamstring was reported by the subject on a scale of 1-10 with 1 being weak and 10 being severe.
Measured: 120 minutes
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Sep 2015 (estimated)
- Study startSep 2015
- Primary completion31 Dec 2016
- Study completion31 Dec 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Charcot Marie Tooth DiseaseStudies of the same condition, open and under way.
- More trials run by University of RochesterThe 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 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 4 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Rochester
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, David Herrmann, University of Rochester
- Investigators
- David Herrmann, MD, Principal investigator, University of Rochester
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02561702
- Sponsor's protocol ID
- RSRB00057653
- Status last verified
- Feb 2018
- First submitted
- 24 Sep 2015
- Last updated
- 26 Mar 2018
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 26 Mar 2018. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Mexiletine for Muscle Cramps in Charcot Marie Tooth Disease
- ClinicalTrials.gov ID
- NCT02561702
- Acronym / sponsor ID
- RSRB00057653
- Conditions
- Charcot Marie Tooth Disease
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 4 participants (actual)
- Lead sponsor
- University of RochesterUniversity, hospital or other
- Study start
- Sep 2015
- Primary completion
- 31 Dec 2016 (actual)
- Study completion
- 31 Dec 2016 (actual)
- First posted
- 28 Sep 2015 (estimated)
- Results
- Posted 26 Mar 2018
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Charcot Marie Tooth Disease is a family of inherited peripheral neuropathies, with over 70 causative genes identified to date.1-4 Muscle cramps are frequent in CMT, affecting up to 85% of patients with some subtypes of CMT. These cramps impact quality of life and have been identified as an important therapeutic target for clinical trials in CMT.1-4 There is no FDA approved treatment for muscle cramps.5 Mexiletine is a sodium channel blocker approved for treatment of arrhythmias. As a sodium channel blocker, mexiletine offers the promise of effective therapy for muscle cramps.
Detailed description
This study will provide data on the short term efficacy of oral mexiletine in helping to prevent muscle cramps in adults with CMT. The study will also assess the short-term safety and tolerability of low dose mexiletine in adults with CMT.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Mexiletine first/placebo second | Experimental | Other: Placebo, Drug: MexiletineParticipants will receive 150 mg of mexiletine by mouth 3 times daily for 5-7 days followed by 7 day washout period and 5-7 days of placebo (240 mg of lactose powder) taken by mouth 3 times daily |
| placebo first/mexiletine second | Experimental | Other: Placebo, Drug: MexiletineParticipants will receive placebo (240 mg of lactose powder) taken by mouth 3 times daily for 5-7 days followed by 7 day washout period and 5-7 days of 150 mg of mexiletine by mouth 3 times daily |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- The subject has known CMT, previously diagnosed by a neurologist with subspeciality expertise in neuromuscular disorders/peripheral neuropathy. The diagnosis of CMT relies on a combination of clinical history (including family history), neurological examination electrophysiological features, and prior genetic testing results.
Key exclusion criteria (9 listed)
- The subject has a known neuropathy from another source (e.g., diabetes, drug induced, alcohol, etc.).
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 |
|---|---|---|
| PlaceboAlso: lactose powder240 mg lactose powder in a size 3 capsule taken by mouth 3 times daily for 5-7 days | Other | Mexiletine first/placebo second, placebo first/mexiletine second |
| Mexiletine150 mg Mexiletine taken by mouth in capsule form 3 times daily for 5-7 days | Drug | Mexiletine first/placebo second, placebo first/mexiletine second |
Primary outcome
Number of Participants With a Decrease in Cramp Duration
Time frame: 120 minutes
Participant will be evaluated for muscle cramps 120 minutes following a single dose of oral mexiletine. The Clinical Evaluator applied pressure to provoke hamstring cramps bilaterally, one at a time 2 hours after dose. The cramp duration in seconds of the right hamstring was used.
Number of Participants With a Decrease in Cramp Intensity
Time frame: 120 minutes
Participant will be evaluated for muscle cramps 120 minutes following a single dose of oral mexiletine. The Clinical Evaluator applied pressure to provoke hamstring cramps bilaterally, one at a time 2 hours after dose. The cramp intensity of the right hamstring was reported by the subject on a scale of 1-10 with 1 being weak and 10 being severe.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 Mar 2018.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
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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. This study is not recruiting at the moment.
David Herrmann, MD principal investigator
University of Rochester
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Mexiletine in people with Charcot Marie Tooth Disease, run by University of Rochester 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 5 inclusion and 9 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: finished, as of the sponsor's last update on 26 Mar 2018. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 26 Mar 2018). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Number of Participants With a Decrease in Cramp Duration (time frame: 120 minutes). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 26 Mar 2018; AzTrials last refreshed its copy on 8 Nov 2026.