Clinical Trial of Vitamin E to Treat Muscular Cramps in Patients With ALS

London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's32 enrolled

Overview

Muscular cramps are a common and uncomfortable symptom of amyotrophic lateral sclerosis (ALS). This clinical trial will compare the response of high dose vitamin E supplementation to placebo for treatment of muscular cramps in patients with ALS. We hypothesize that vitamin E will be more effective than placebo in treating cramps.

This will be a single centre randomized placebo controlled crossover design trial. Participants will be randomized at study entry to protocol A (vitamin E first) or protocol B (placebo first). The first 2 weeks of the study will be a baseline assessment of the frequency, severity and duration of cramps. Patients will be blinded for the remainder of the duration of the study. For weeks 3-6 of the study, group A will receive vitamin E 800 IU bid and group B will receive placebo. For weeks 7-10 of the study, group A will receive placebo and group B will receive vitamin E. Participants will record cramp frequency and characteristics via a daily journal for the duration of the study, however the data analysis will focus on cramp frequency only during weeks 5-6 and 9-10. Weeks 3-4 and 7-8 will be used as time periods to allow the new drug to come to steady state and allow for washout of the previous drug. Data analysis will focus on the difference in cramp frequency in individual patients in each treatment period.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Enrollment

Conditions

Amyotrophic Lateral Sclerosis

Interventions

Vitamin EDIETARY_SUPPLEMENT

Vitamin E 800IU bid

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Adults (\> age 18 years) * Probable or definite ALS by El Escorial Revised criteria * At least 2 painful muscle cramps in one or more of the limbs per week. * May have tried other medications for cramping in the past. * If participants are currently on treatment for cramps and are continuing to have at least 2 cramps per week, they can be included in the trial. In this situation, the individual's previous cramp medication can be continued during the trial. * Ideally, patients should not have any medication alterations during the duration of the trial. * Willing to discontinue supplementary vitamin E and multivitamins containing \> 400 IU of vitamin E during the trial. Exclusion Criteria: * Patients who are unable to safely consume the trial capsules. Individuals with significant dysphagia can be included into the study if they have a functioning PEG tube or GJ tube, through which the medication can be given. * Patients who are unable to fill out the daily diary, either personally or via a proxy. * Patients who have had medication changes within the last 4 weeks prior to the onset of the trial will be excluded.

Locations (1)

London Health Sciences Centre

London, Ontario, Canada

Outcomes

Primary Outcomes

Reduction in number of muscle cramps experienced in a two week period.

Time frame: 4 weeks

Secondary Outcomes

Reduction in the duration of cramps and reduction in the severity of cramps

Time frame: 4 weeks

Data from ClinicalTrials.gov

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