Can a cough medicine ease nerve pain after spinal cord injury?
NCT ID NCT01435798
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested three doses of dextromethorphan (a common cough medicine) against a placebo to see if it could reduce nerve pain in people with spinal cord injuries. 26 adults with chronic central neuropathic pain took part. The goal was to measure pain relief and satisfaction with treatment.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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26 people
The number who actually took part.
- Start date
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Apr 2003
- Finished
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Jan 2008
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 70 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Healthy male or female adults, age 18 to 70 with central neuropathic pain for a minimum of 3 months following SCI as confirmed by neurologic evaluation, with an average pain intensity score of at least moderate over at least 50% of the day for the 7 days prior to the screening visit and over the 7 days prior to starting study medication. 2. Subjects used no medication or a stabilized medication regimen for chronic and well-controlled medical conditions 3. Serum laboratory examination obtained at study entry: * Liver function tests (albumin within 20% of normal, SGOT/SGPT within 50% of normal). * For women of childbearing age: negative serum beta HCG. 4. Postmenopausal women, or be physically incapable of childbearing, or be practicing an acceptable method of birth control. 5. Normal cognitive function. 6. Normal communicative ability (English). 7. Ability to demonstrate competence in recording five times daily in pain diary for 1 week (with 100% compliance), and in completing required questionnaires. 8. Signed informed consent. Exclusion Criteria: 1. Pregnancy or breast-feeding. 2. Renal or hepatic dysfunction. 3. Significant cardiac disease (e.g. MI within 1 year). 4. Signs or symptoms of central neurological disorder, excluding SCI. 5. Severe psychological disorder requiring treatment. 6. Concurrent use of monoamine oxidase inhibitors within 2 weeks prior to study entry. 7. Use of known CYP2D6 (but not CYP3A4) inhibitors or inducers. 8. History of hypersensitivity or intolerance to dextromethorphan or lidocaine. 9. Chronic substance abuse, including alcohol. 10. Participation in a study of an investigational drug or device within 30 days prior to screening for this study. 11. Poor metabolizer of P450 2D6 substrates.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Translational Pain Research, Brigham and Women's Hospital
Boston, Massachusetts, 02115, United States
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Other studies related to the condition(s) this trial covers.
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