Evaluating ranolazine for treating ALS symptoms

Ranolazine in ALS: Safety, and Effect on Cramps, Function and Quality of Life.

Phase 2 Interventional University of California, San Francisco · NCT06527222

This study is testing if the medication ranolazine can help improve muscle cramps and quality of life for people with ALS.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment72 (estimated)
Ages18 Years and up
SexAll
SponsorUniversity of California, San Francisco Academic / other
Locations7 sites (San Francisco, California and 6 other locations)
Trial IDNCT06527222 on ClinicalTrials.gov

What this trial studies

This study investigates the safety and efficacy of ranolazine in treating symptoms of Amyotrophic Lateral Sclerosis (ALS), specifically focusing on muscle cramps, functional ability, and quality of life. It is a multi-center, double-blind, placebo-controlled trial involving two doses of ranolazine administered twice daily to participants. Approximately 72 adults diagnosed with ALS will be enrolled across seven treatment sites in the United States, with participants required to attend both onsite and remote research visits over a period of 28 weeks.

Who should consider this trial

Good fit: Ideal candidates for this study are adults aged 18 and older who have been diagnosed with ALS and experience frequent muscle cramps.

Not a fit: Patients with a disease duration of less than 5 years or those requiring extensive respiratory support may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a new treatment option to alleviate muscle cramps and improve quality of life for ALS patients.

How similar studies have performed: While there have been various studies on ALS treatments, the specific use of ranolazine for this purpose is novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* 18 years or older
* Diagnosed with clinically definite, possible, probably, or lab-supported probable ALS per revised El Escorial criteria
* Breathing assessment called forced vital capacity (FVC) greater than or equal to 50%.
* Able to swallow pills at the start of the study and expected to for the length of the study.
* If on ALS modifying medications must be on a stable dose at least 30 days.
* Experiencing 4 or more cramps per week during a 2-week screening period.

Exclusion Criteria:

* Disease duration \< 5 years
* Tracheostomy invasive ventilation, or noninvasive ventilation of more than 12 hours/day
* Pregnant or lactating, adults unable to consent, and prisoners
* Taking ranolazine or investigational drug or has received an investigational drug within 30 days (or 5 half-lives for drugs, whichever is longer) prior to screening
* Medically uncontrolled comorbidities (heart, liver, kidney disease)
* Baseline QTc interval prolongation \>450 ms for men/ \>470 ms for women, history of long QT syndrome, or medications which prolong the QT interval
* Participation in an experimental drug trial less than 30 days before screening
* Patients have to be on a stable dosage of any medications used to treat muscle cramps for ≥30 days or have been off these medications ≥30 days prior to randomization.

Where this trial is running

San Francisco, California and 6 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Amyotrophic Lateral SclerosisALSMotor Neuron DiseaseLou Gehrig's DiseasePlacebo-Controlled
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.