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Memantine for Disability in Amyotrophic Lateral Sclerosis (MEDALS)

This study has been completed.
H. Lundbeck A/S
Information provided by:
University of Lisbon Identifier:
First received: July 18, 2006
Last updated: March 30, 2009
Last verified: March 2009
The purpose of this trial is to study the effect of Memantine (uncompetitive, moderate affinity, NMDA receptor antagonist that binds to the NMDA receptor channel, and regulates the calcium influx into the neurons), a drug used to treat Alzheimer´s disease, on the progression of Amyotrophic Lateral Sclerosis (ALS). Memantine is added to riluzole (the single drug approved to treat ALS).

Condition Intervention Phase
Amyotrophic Lateral Sclerosis Drug: Memantine (Ebixa) Drug: riluzole Drug: Placebo Phase 2 Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: Phase 2-3 - Memantine for Disability in Amyotrophic Lateral Sclerosis

Resource links provided by NLM:

Further study details as provided by University of Lisbon:

Primary Outcome Measures:
  • ALS-FRS [ Time Frame: 12 months ]

Secondary Outcome Measures:
  • QoL, depression scale, strength (clinical evaluation), forced vital capacity [ Time Frame: 12 months ]
  • neurophysiology (motor unit counting, neurophysiological index) [ Time Frame: 12 months ]

Enrollment: 63
Study Start Date: July 2005
Study Completion Date: January 2009
Primary Completion Date: June 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1 - active
memantine + riluzole
Drug: Memantine (Ebixa)
10 mg bid
Other Name: Ebixa
Drug: riluzole
riluzole 50 mg bid
Other Name: rilutek
Placebo Comparator: 2
riluzole + placebo
Drug: riluzole
riluzole 50 mg bid
Other Name: rilutek
Drug: Placebo

Detailed Description:

Phase 2/3 trial in ALS patients Double-blinded, parallel, randomized (2 blocs, bulbar/spinal onset)

Memantine + riluzole x Placebo + Memantine

Inclusion criteria:

  • < 75 years at disease onset
  • < 3 years of disease progression
  • ALS-FRS > 24
  • FVC > 60
  • Probable or definite disease (revised El Escorial criteria)
  • No other medical condition
  • Normal blood tests
  • Regular medication on riluzole > 1 month
  • Nerve conduction studies ruling out conduction block
  • EMG with widespread loss of motor units (revised El Escorial criteria)
  • At least one hand with ADM strength > 2 on MRC scale

Duration - 2 years

Evaluation - every 3 months

Primary outcome - ALS-FRS Secondary -SF36, Hamilton depression scale, motor unit number estimation, neurophysiological index, strength (clinical evaluation); side-effects

Intention to treat analysis

60 patients

number estimated for 50% change in decline rate of ALS-FRS


Ages Eligible for Study:   20 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Definite or probable disease - revise El Escorial criteria
  • Normal blood tests
  • Riluzole treatment during 1 month or more
  • EMG in accordance with El Escorial criteria

Exclusion Criteria:

  • Other diseases (such as PNP)
  • Both ADM muscles < 3 on MRC scale
  • Conduction block on nerve conduction tests
  • Disease duration > 3 years
  • ALS-FRS < 25
  • Forced vital capacity - <60%
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Please refer to this study by its identifier: NCT00353665

Department of Neurology - Hospital de Santa Maria
Lisbon, Portugal, 1649-028
Sponsors and Collaborators
University of Lisbon
H. Lundbeck A/S
Principal Investigator: Mamede de Carvalho, MD Department of Neurology- Hospital de Santa Maria
  More Information

Responsible Party: Mamede de Carvalho, Instituto de Medicina Molecular Identifier: NCT00353665     History of Changes
Other Study ID Numbers: 002-04
Study First Received: July 18, 2006
Last Updated: March 30, 2009

Keywords provided by University of Lisbon:
amyotrophic lateral sclerosis
motor neuron disease
clinical trial

Additional relevant MeSH terms:
Amyotrophic Lateral Sclerosis
Motor Neuron Disease
Pathologic Processes
Neurodegenerative Diseases
Nervous System Diseases
Neuromuscular Diseases
Spinal Cord Diseases
Central Nervous System Diseases
TDP-43 Proteinopathies
Proteostasis Deficiencies
Metabolic Diseases
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Excitatory Amino Acid Antagonists
Excitatory Amino Acid Agents
Neuroprotective Agents
Protective Agents processed this record on September 20, 2017