A Study of Ranolazine in ALS

Open to people ages 18 years and up

• 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.

• 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.