A Study for Patients Who Completed VITALITY-ALS (CY 4031) VIGOR-ALS


About this study

The purpose of this study is to assess the long-term safety and tolerability of tirasemtiv in patients with ALS.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria: 

  • Able to comprehend and willing to sign an Informed Consent Form (ICF). If verbal consent is given, a Legal Designee of the patient must sign the ICF form 
  • Completed participation on study drug and the Follow-Up Visit in the CY 4031 study 
  • Male patients, who have not had a vasectomy AND confirmed zero sperm count, must agree for the duration of their participation in the study to either:
    • Use a condom during sexual intercourse with female partners who are of childbearing potential AND to have female partners use a highly effective means of contraception OR
    • Abstain from sexual intercourse during participation in the study 
  • Female patients who are not post-menopausal (≥ 1 year) or sterilized, must: 
    • Not be breastfeeding
    • Have a negative pregnancy test
    • Have no intention to become pregnant during participation in the study AND 
    • Practice sexual abstinence, defined as refraining from intercourse during the duration of the study OR if male partners are not vasectomized with a confirmed zero sperm count, require use of a condom AND use of a highly effective contraceptive measure

Exclusion Criteria:

  • Has a diaphragm pacing system (DPS) at study entry or anticipate DPS placement during the course of the study 
  • Has taken an investigational study drug (other than tirasemtiv) prior to dosing, within 30 days or five half-lives of the prior agent, whichever is greater 
  • Use of tizanidine and theophylline-containing medications during study participation
  • Participation or planning to participate in any form of stem cell therapy for the treatment of ALS or another investigational drug

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status

Jacksonville, Fla.

Mayo Clinic principal investigator

Bjorn Oskarsson, M.D.

Closed for enrollment

More information


Publications are currently not available

Additional contact information

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Phone: 800-664-4542 (toll-free)

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