Short-Term Effects of Medicinal Cannabis Therapy on Spasticity in Multiple Sclerosis

Study Overview
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Brief Summary
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The purpose of this study is to determine whether or not smoked marijuana improves spasticity in patients with multiple sclerosis.

Detailed Description
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Studies of cannabinoids for spasticity in MS have had mixed results but clinical studies have been small, generally not properly controlled, with results controversial, and difficult to interpret. Recently, investigators in the UK and US tested the ability of cannabinoids to control spasticity and tremor symptoms of the MS-like disease, experimental allergic encephalomyelitis, in mice (Baker et al, 2000). The authors found that four different cannabinoids quantitatively ameliorated both tremor and spasticity in diseased mice; thus providing rationale for patients' reports of the therapeutic effects of cannabis in the control of their MS symptoms. The present study will be a randomized, placebo-controlled, crossover design of 30 patients who will be assessed before and after treatment for 3 consecutive days (Phase I), undergo washout-out for a total of 11 days, and then cross over to either the placebo or active treatment phase (Phase II), depending on what they received during Phase I. At each study visit, patients will utilize a controlled puff procedure to help ensure stable intake (Levin et al, 1989). Comparisons: A single dose of 4% THC marijuana cigarette each day for 3 days will be compared to a placebo administered under the same dosing conditions for the relief of spasticity, drug tolerability, and changes in global functioning and quality of life indices.

Official Title
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Short-Term Effects of Medicinal Cannabis Therapy on Spasticity in Multiple Sclerosis

Conditions
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Multiple Sclerosis

Intervention / Treatment
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* Drug: Smoked Cannabis


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Clinically definite or probable, laboratory-supported MS Complaints of spasticity and at least moderate increase in tone as evidenced by a score of >= 2 on the Modified Ashworth Scale at either the elbow, hip, or knee If on disease-modifying therapy (ABC), have been on a stable dose for at least six months Fluent in English If not cannabis-naive, must refrain from smoking cannabis for two weeks prior to screening (confirmed by urinalysis) If on either lioresal (Baclofen) or tizanadine (Zanaflex), have been on a stable dose for at least three months >=18 years of age Exclusion Criteria: Axis I psychiatric disorder especially depression or significant neurological disease other than MS as determined by the PI Recent history of active substance abuse defined as daily use for at least 14 days within the past month Drug use restrictions, eg, subjects on probation or parole, employment involving high risk to themselves and/or the public (airline pilot, bus driver, etc.) Any unstable medical health problem Any known pulmonary disorders, including tuberculosis, asthma, or COPD Pregnant or nursing Require benzodiazepines to control spasticity Require high doses of analgesic medications on a daily basis

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double


Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: Smoked Cannabis|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Reduction in spasticity as indicated by the: Ashworth Spasticity Scale, Timed 25-ft Walk, and Grooved Pegboard Test |  |  | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Tolerability of study drug as determined by the Brief Symptom Inventory, Subjective Ratings of High and Sedation-Revised, and UKU Side Effect Rating Scale |  |  | 
| Effect of study drug on global functioning and quality of life as indicated by the Multiple Sclerosis Quality of Life Inventory |  |  | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Cannabis, Multiple Sclerosis, Spasticity, Tolerability