for people ages 18-65 (full criteria)
at UC Irvine UCLA
study started
completion around



This study is an open-label extension to evaluate the safety and tolerability of long-term dosing of Losmapimod in patients with FSHD1 who participated in the ReDux4 study.

Official Title

A Phase 2, Randomized, Double-Blind, Placebo-Controlled, 48-Week, Parallel-Group Study of the Efficacy and Safety of Losmapimod in Treating Subjects With Facioscapulohumeral Muscular Dystrophy (FSHD) With Open-Label Extension (OLE)


This study is an open-label extension study to evaluate the safety and tolerability of long-term dosing of Losmapimod in patients with FSHD1 who participated in the ReDux4 study.

This study is a multi-center clinical trial. It will be conducted in North America, Canada and Europe. Only patients who participated and competed all study procedures in the ReDUX4 Study treatment period will be eligible to participate in this open label extension study.

Patients who complete the randomized, placebo-controlled portion of the study will have the option to roll over into the open-label extension study.

Patients will receive 15 mg of losmapimod by mouth twice daily for a total of 30 mg by mouth daily. All patients will attend clinic visits approximately every 12 weeks.

Participation in this open-label extension study will continue until 90 days after losmapimod becomes commercially available, the patient withdraws from the study, or the Sponsor decides to close the study.

The primary endpoint of the study is to evaluate the safety and tolerability of long-term dosing of losmapimod in patients with FSHD.


Facioscapulohumeral Muscular Dystrophy (FSHD), FSHD, FSHD1, Muscular Dystrophy, Muscular Dystrophies, Facioscapulohumeral Muscular Disorders, Musculoskeletal Diseases, Neuromuscular Diseases, Facioscapulohumeral Muscular Dystrophy, Losmapimod


You can join if…

Open to people ages 18-65

  • The patient must have consented to participate and must have provided signed, dated and witnessed an IRB-approved informed consent form that conforms to federal and institutional guidelines.
  • Male or female subjects
  • Patients must be between 18 and 65 years of age, inclusive
  • Must be will and able to comply with scheduled visits, treatment plan, study restrictions, laboratory tests, contraceptive guidelines and other study procedures.
  • Will practice an approved method of birth control

You CAN'T join if...

  • Has a history of any illness or any clinical condition that, in the opinion of the investigator, might confound the results of the study or pose an additional risk in administering study drug to the subject. This may include, but is not limited to, a history of relevant drug or food allergies; history of cardiovascular or central nervous system disease; neuromuscular diseases except FSHD (eg, myopathy, neuropathy, neuromuscular junction disorders); or clinically significant history of mental disease.
  • For subjects who are on drug(s) or supplements that may affect muscle function, as determined by the treating physician, or that are included in the list of drugs presented in the protocol, subjects must be on a stable dose of that drug(s) or supplement for at least 3 months prior to the first dose of study drug and remain on that stable dose for the duration of the study. Changes to the dose or treatment discontinuation during the study can only be done for strict medical reasons by the treating physician with clear documentation and notification to the sponsor.


  • University of California Irvine
    Irvine California 92868 United States
  • University of California Los Angeles (UCLA)
    Los Angeles California 90095 United States


in progress, not accepting new patients
Start Date
Completion Date
Fulcrum Therapeutics
Phase 2 Facioscapulohumeral Muscular Dystrophy Research Study
Study Type
About 76 people participating
Last Updated