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Safety and Efficacy Study of Oral Fampridine-SR in Patients With Multiple Sclerosis

This study has been completed.
Information provided by:
Acorda Therapeutics Identifier:
First received: January 29, 2003
Last updated: August 3, 2011
Last verified: August 2011
Multiple Sclerosis (MS) is a disorder of the body's immune system that affects the Central Nervous System (CNS). Normally, nerve fibers carry electrical impulses through the spinal cord, providing communication between the brain and the arms and legs. In people with MS, the fatty sheath that surrounds and insulates the nerve fibers (called "myelin") deteriorates, causing nerve impulses to be slowed or stopped. As a result patients with MS may experience periods of muscle weakness and other symptoms such as numbness, loss of vision, loss of coordination, paralysis, spasticity, mental and physical fatigue and a decrease in the ability to think and/or remember. These periods of illness may come (exacerbations) and go (remissions). Fampridine-SR (Sustained Release, SR) is an experimental drug that increases the ability of the nerve to conduct electrical impulses. This study will evaluate the effects of Fampridine-SR on the walking ability of subjects with MS, as well as to examine the effects on muscle strength and spasticity. The study will also examine the possible risks of taking Fampridine-SR.

Condition Intervention Phase
Multiple Sclerosis Drug: Placebo Drug: 10 milligram (mg) fampridine-SR (4-aminopyridine, 4-AP) Drug: 15 mg fampridine-SR (4-aminopyridine, 4-AP) Drug: 20 mg fampridine-SR (4-aminopyridine, 4-AP) Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Double-Blind, Placebo-Controlled, 20-Week, Parallel Group Study to Evaluate Safety, Tolerability and Activity of Oral Fampridine-SR in Subjects With Multiple Sclerosis

Resource links provided by NLM:

Further study details as provided by Acorda Therapeutics:

Primary Outcome Measures:
  • Median Percent Change From Baseline in Average Walking Speed on Timed 25-Foot Walk Test [ Time Frame: Baseline (placebo run-in period); 12-week stable dose period ]
    The primary efficacy variable was the percent change from baseline in average walking speed measured using the Timed 25-Foot Walk Test during the 12-week stable dose period (the average of Study Days 56, 84, and 112), relative to the mean at baseline (placebo run-in period, the average of Study Days 7 and 14).

Enrollment: 206
Study Start Date: February 2003
Study Completion Date: December 2003
Primary Completion Date: December 2003 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: 1
Placebo control, twice a day (b.i.d.)
Drug: Placebo
Placebo for 15 weeks
Experimental: 2
10 milligram (mg) fampridine b.i.d.
Drug: 10 milligram (mg) fampridine-SR (4-aminopyridine, 4-AP)

2 week up titration (10 mg)

12 weeks stable dose (10 mg)

1 week down titration (10 mg)

Experimental: 3
15 mg fampridine b.i.d.
Drug: 15 mg fampridine-SR (4-aminopyridine, 4-AP)

10 mg twice daily for 1 week

15 mg twice daily for 14 weeks

2 week up titration (10 mg x 1 week, 15 mg x 1 week)

12 weeks stable dose (15 mg)

1 week down titration (10 mg)

Experimental: 4
20 mg fampridine b.i.d.
Drug: 20 mg fampridine-SR (4-aminopyridine, 4-AP)

2 week up titration (10 mg x 1 week, 15 mg x 1 week)

12 weeks stable dose (20 mg)

1 week down titration (15 mg x 3 days, 10 mg x 4 days)


Ages Eligible for Study:   18 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


  • Have a confirmed diagnosis of Multiple Sclerosis
  • Are able to walk with or without an assisted device


  • Pregnancy, breastfeeding or females of childbearing potential not using adequate birth control
  • Participating in other investigational drug trials
  • A medical history or clinical findings that preclude entry into the study
  • A medication history that precludes entry into the study
  • Previously treated with 4-aminopyridine (4-AP)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00053417

  Show 25 Study Locations
Sponsors and Collaborators
Acorda Therapeutics
  More Information

Additional Information:
Responsible Party: Andrew Blight/Chief Scientific Officer, Acorda Therapeutics Identifier: NCT00053417     History of Changes
Other Study ID Numbers: MS-F202
Study First Received: January 29, 2003
Results First Received: May 16, 2011
Last Updated: August 3, 2011

Keywords provided by Acorda Therapeutics:
Walking Ability
Muscle strength

Additional relevant MeSH terms:
Multiple Sclerosis
Pathologic Processes
Demyelinating Autoimmune Diseases, CNS
Autoimmune Diseases of the Nervous System
Nervous System Diseases
Demyelinating Diseases
Autoimmune Diseases
Immune System Diseases
Potassium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action processed this record on August 22, 2017