Diabetic NeuropathiesPhase 2NCT00001344
Dextromethorphan Versus Placebo for Neuropathic Pain
A Phase 2 study testing dextromethorphan in people with Diabetic Neuropathies and Herpes Zoster, run by National Institute of Dental and Craniofacial Research (NIDCR) at 1 site in United States.
Trial summary
In our current clinical trial, we are comparing the effects of two NMDA receptor antagonists to placebo in patients with painful distal symmetrical diabetic neuropathy or post-herpetic neuralgia. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Diabetic Neuropathies, Herpes Zoster, Neuralgia
- What is being tested?
- dextromethorphan
- How many people
- 129 participants
- Where
- 1 siteUnited States
- Study dates
- Mar 1993to Feb 2001
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Patients must be over 18 years of age.
Patients must have a definite diagnosis of diabetic neuropathy or post herpetic neuralgia or a diagnosis of neuropathic pain of various etiologies other than diabetic neuropathy or post herpetic neuralgia.
Duration of symptoms must be at least 3 months.
Severity of pain must be at least mild, if constant; or at least moderate, if intermittent and at least 2 hours duration a day.
Patients using tricyclics, narcotics, or antiseizure medications, must keep the drug dosages constant throughout the study.
No patients with unstable disease process; i.e., angina pectoris, accelerated hypertension, recent stroke or transient cerebral ischemia, uncontrolled seizures.
No pregnant or lactating women. Women of child bearing potential must use birth control pills, intrauterine device, or barrier contraceptive devices.
No history of significant drug abuse or PCP use. No history of IV drug abuse, prescription drug abuse, or alcoholism.
No significant liver or kidney disease.
No MAO inhibitors.
No cognitive impairment or language difficulty as judged by difficulty completing pain diary, medical history, or telephone conversation.
Patients must not have any other chronic pain condition that gives them pain greater than the neuropathy pain.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Institute of Dental And Craniofacial Research (NIDCR)
Bethesda, Maryland, 20892
About this study
In our current clinical trial, we are comparing the effects of two NMDA receptor antagonists to placebo in patients with painful distal symmetrical diabetic neuropathy or post-herpetic neuralgia. The treatments in this three-period crossover study are dextromethorphan, up to 920 mg/day (about 8 times the antitussive dose), memantine, 30-50 mg/day, and placebo. Memantine is an NMDA antagonist used in Europe to treat Parkinson's disease and Alzheimer's disease. The underlying hypothesis, based on studies of painful neuropathies in animal models, is that neuropathic pain is caused largely by sensitization of central nervous system neurons caused by excitatory amino acid neurotransmitters, acting largely through NMDA receptors. A previous small trial of dextromethorphan suggested efficacy in diabetic neuropathy pain. The study requires one visit to the NIH outpatient Pain Research Clinic, and consists of three 9-week treatment periods. Patients who respond to one of the medications will be invited to participate in further controlled studies of the medication followed by up to several years of open-label treatment under continued observation.
Read the detailed description
In our current clinical trial, we are comparing the effects of two NMDA receptor antagonists to placebo in patients with painful distal symmetrical diabetic neuropathy or post-herpetic neuralgia. The treatments in this three-period crossover study are dextromethorphan, up to 920 mg/day (about 8 times the antitussive dose), memantine, 30-50 mg/day, and placebo. Memantine is an NMDA antagonist used in Europe to treat Parkinson's disease and Alzheimer's disease. The underlying hypothesis, based on studies of painful neuropathies in animal models, is that neuropathic pain is caused largely by sensitization of central nervous system neurons caused by excitatory amino acid neurotransmitters, acting largely through NMDA receptors. A previous small trial of dextromethorphan suggested efficacy in diabetic neuropathy pain. The study requires one visit to the NIH outpatient Pain Research Clinic, and consists of three 9-week treatment periods. Patients who respond to one of the medications will be invited to participate in further controlled studies of the medication followed by up to several years of open-label treatment under continued observation.
- Conditions
- Diabetic Neuropathies, Herpes Zoster, Neuralgia
- Being tested
- dextromethorphan
- Keywords
- Diabetes Mellitus, Diabetic Neuropathy, Memantine, NMDA Receptor Antagonists, Neuropathic Pain, Neuropathy, Post-Herpetic Neuralgia, Shingles
- Medical subject headings
- Diabetic Neuropathies, Herpes Zoster, Neuralgia, Diabetes Mellitus, Neuralgia, Postherpetic
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
dextromethorphanDrug
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Dec 2002 (estimated)
- Study startMar 1993
- Study completionFeb 2001
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Diabetic NeuropathiesStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Enrolment
- 129 participants
Sponsor and investigators
- Lead sponsor
- National Institute of Dental and Craniofacial Research (NIDCR)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00001344
- Sponsor's protocol ID
- 930114
- Other IDs
- 93-D-0114
- Status last verified
- Mar 2000
- First submitted
- 3 Nov 1999
- Last updated
- 4 Mar 2008
- Results posted
- No
Publications
Albers GW, Saenz RE, Moses JA Jr, Choi DW. Safety and tolerance of oral dextromethorphan in patients at risk for brain ischemia. Stroke. 1991 Aug;22(8):1075-7. doi: 10.1161/01.str.22.8.1075.
PubMed 1866755Bakshi R, Faden AI. Competitive and non-competitive NMDA antagonists limit dynorphin A-induced rat hindlimb paralysis. Brain Res. 1990 Jan 15;507(1):1-5. doi: 10.1016/0006-8993(90)90512-a.
PubMed 1967971Choi DW. Dextrorphan and dextromethorphan attenuate glutamate neurotoxicity. Brain Res. 1987 Feb 17;403(2):333-6. doi: 10.1016/0006-8993(87)90070-9.
PubMed 2881608
Study at a glance
From the registry record, last updated by the sponsor on 4 Mar 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Dextromethorphan Versus Placebo for Neuropathic Pain
- ClinicalTrials.gov ID
- NCT00001344
- Acronym / sponsor ID
- 930114
- Conditions
- Diabetic Neuropathies, Herpes Zoster, Neuralgia
- Keywords
- Diabetes Mellitus, Diabetic Neuropathy, Memantine, NMDA Receptor Antagonists, Neuropathic Pain, Neuropathy, Post-Herpetic Neuralgia, Shingles
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 129 participants
- Lead sponsor
- National Institute of Dental and Craniofacial Research (NIDCR)US National Institutes of Health
- Study start
- Mar 1993
- Study completion
- Feb 2001
- First posted
- 10 Dec 2002 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
In our current clinical trial, we are comparing the effects of two NMDA receptor antagonists to placebo in patients with painful distal symmetrical diabetic neuropathy or post-herpetic neuralgia. The treatments in this three-period crossover study are dextromethorphan, up to 920 mg/day (about 8 times the antitussive dose), memantine, 30-50 mg/day, and placebo. Memantine is an NMDA antagonist used in Europe to treat Parkinson's disease and Alzheimer's disease. The underlying hypothesis, based on studies of painful neuropathies in animal models, is that neuropathic pain is caused largely by sensitization of central nervous system neurons caused by excitatory amino acid neurotransmitters, acting largely through NMDA receptors. A previous small trial of dextromethorphan suggested efficacy in diabetic neuropathy pain. The study requires one visit to the NIH outpatient Pain Research Clinic, and consists of three 9-week treatment periods. Patients who respond to one of the medications will be invited to participate in further controlled studies of the medication followed by up to several years of open-label treatment under continued observation.
Detailed description
In our current clinical trial, we are comparing the effects of two NMDA receptor antagonists to placebo in patients with painful distal symmetrical diabetic neuropathy or post-herpetic neuralgia. The treatments in this three-period crossover study are dextromethorphan, up to 920 mg/day (about 8 times the antitussive dose), memantine, 30-50 mg/day, and placebo. Memantine is an NMDA antagonist used in Europe to treat Parkinson's disease and Alzheimer's disease. The underlying hypothesis, based on studies of painful neuropathies in animal models, is that neuropathic pain is caused largely by sensitization of central nervous system neurons caused by excitatory amino acid neurotransmitters, acting largely through NMDA receptors. A previous small trial of dextromethorphan suggested efficacy in diabetic neuropathy pain. The study requires one visit to the NIH outpatient Pain Research Clinic, and consists of three 9-week treatment periods. Patients who respond to one of the medications will be invited to participate in further controlled studies of the medication followed by up to several years of open-label treatment under continued observation.
Study design
- Primary purpose
- Treatment
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| dextromethorphan | Drug | – |
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Mar 2008.
- Background: PubMed 1866755Albers GW, Saenz RE, Moses JA Jr, Choi DW. Safety and tolerance of oral dextromethorphan in patients at risk for brain ischemia. Stroke. 1991 Aug;22(8):1075-7. doi: 10.1161/01.str.22.8.1075.
- Background: PubMed 1967971Bakshi R, Faden AI. Competitive and non-competitive NMDA antagonists limit dynorphin A-induced rat hindlimb paralysis. Brain Res. 1990 Jan 15;507(1):1-5. doi: 10.1016/0006-8993(90)90512-a.
- Background: PubMed 2881608Choi DW. Dextrorphan and dextromethorphan attenuate glutamate neurotoxicity. Brain Res. 1987 Feb 17;403(2):333-6. doi: 10.1016/0006-8993(87)90070-9.
Related trials for Diabetic Neuropathies
RecruitingObservational study
Safety and Effect of Peripheral Nerve Decompression Combined With Peripheral Nerve Stimulation for Painful Diabetic Peripheral Neuropathy
Painful Diabetic Peripheral Neuropathy, Diabetes Complication
Recruiting
Continuous Monitoring of Plantar Temperature Variations Using Connected Insoles and a Mobile Application for Diabetic Foot.
Diabetic Foot Disease, Diabetic Foot Infection
Active, not recruiting
EDX110 Randomized Control Trial for Treatment of DFUs
Wound Heal, Diabetic Foot Ulcer
Recruiting
DiaFootCare to Promote Self-Care of Diabetic Foot Ulcers in Oman
Diabetic Foot Ulcer (DFU), Diabetes Mellitus
Not yet recruiting
Adaptive Gamified Sensory Training on Sensory Function and Limb-Specific Functional Performance in Patients With Diabetic Peripheral Neuropathy
Diabetic Peripheral Neuropathy
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing dextromethorphan in people with Diabetic Neuropathies and Herpes Zoster, run by National Institute of Dental and Craniofacial Research (NIDCR) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Mar 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00001344, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Mar 2008.