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Generated: February 22, 2018

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CLINICAL TRIALS PROFILE FOR
DEXTROMETHORPHAN POLISTIREX

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Clinical Trial Listing

Trial ID Title Status Sponsor Phase Summary
NCT00000352 Effects of Dextromethorphan on Opioid Tolerance in Methadone Patients - 1CompletedUniversity of PennsylvaniaPhase 2 The purpose of this study is to determine if addition of dextromethorphan to a stable dose of methadone in opioid dependent subjects will significantly affect physical and psychological aspects of opioid tolerance.
NCT00000352 Effects of Dextromethorphan on Opioid Tolerance in Methadone Patients - 1CompletedNational Institute on Drug Abuse (NIDA)Phase 2 The purpose of this study is to determine if addition of dextromethorphan to a stable dose of methadone in opioid dependent subjects will significantly affect physical and psychological aspects of opioid tolerance.
NCT00001344 Dextromethorphan Versus Placebo for Neuropathic PainCompletedNational Institute of Dental and Craniofacial Research (NIDCR)Phase 2 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.
NCT00001365 Dextromethorphan for the Treatment of Parkinson's Disease and Similar Conditions of the Nervous SystemCompletedNational Institute of Neurological Disorders and Stroke (NINDS)Phase 2 This study is designed to determine whether dextromethorphan, a drug commonly found in cough medicine, is beneficial and safe for the treatment of Parkinson's disease and other diseases that might share biochemical abnormalities with Parkinson's disease. Patients with Parkinson's disease are missing the chemical neurotransmitter dopamine. This occurs as a result of destructive changes in an area of the brain responsible for making dopamine, the basal ganglia. Rhythmical muscular tremors, rigidity of movement, shuffling footsteps, droopy posture, and a mask-like expression on the face characterize Parkinson's disease. Researchers believe that dextromethorphan may be able to safely modify psychomotor function of patients with Parkinson's Disease.
NCT00001725 Studies of Dextromethorphan and Topiramate to Treat Oral and Facial PainCompletedNational Institute of Dental and Craniofacial Research (NIDCR)Phase 2 This study will evaluate the safety and effectiveness of two drugs-dextromethorphan and topiramate-in treating orofacial (mouth and face) pain. Dextromethorphan, a commonly used cough suppressant, and topiramate, an anti-seizure medicine, block certain receptors on brain and spinal nerve cells that may cause the cells to produce electrical discharges and pain. Patients 18 years of age and older with oral and facial pain with trigeminal nerve damage and who have had pain daily for at least 3 months may be eligible for this study. Candidates will be screened with a medical history, physical examination, blood tests and psychiatric evaluation. These results will serve as baseline values for participants. Those enrolled in the study will take either dextromethorphan or topiramate in a 2-part study as follows: Dextromethorphan In Part 1, patients will take dextromethorphan and lorazepam (a commonly used anti-anxiety drug) separately in two 6-week periods. (Lorazepam is used in this study as an "active placebo" for comparison with dextromethorphan. An active placebo is a drug that does not work for the problem being studied but whose side effects are like those of the test drug.) They will take dextromethorphan for 4 weeks to determine the maximum tolerated dose (the highest dose that does not cause troubling side effects) and will stay on that dose for the remaining 2 weeks. Then they will repeat this process with lorazepam. Patients who respond to either drug may continue with Part 2 of the study, which compares these two drugs four more times to confirm the response seen in Part 1. In Part 2, the maximum tolerated dose will be determined in a 2-week period and that dose will be continued for another 2 weeks. This procedure will be repeated eight times. Throughout the study, patients will keep a daily pain diary. They will be contacted by telephone 2 to 3 times a week during dose escalation to check for side effects. At the end of each of the two 6-week periods in Part 1 and at the end of each 4-week period in Part 2 of the study, patients will have a 1-hour clinic visit. Participants who live more than a few hours' drive from NIH will have a full telephone follow-up evaluation instead of the clinic visits. Topiramate Patients who receive topiramate will follow a plan similar to that described above for dextromethorphan, with the following exceptions. They will take topiramate and an inactive placebo (a look-alike pill that has no active ingredients) in two separate 12-week periods. Patients' maximum tolerated dose will be determined in the first 8 weeks and they will stay on that dose for the remaining 4 weeks of each period. Patients who respond to the medication in Part 1 may continue with Part 2 to confirm the response. Part 2 consists of six 6-week periods. The first 4 weeks of each will be used to determine the maximum tolerated dose and the patient will remain on that dose for the next 2 weeks. Patients will keep a daily pain diary and will be contacted by phone 2 to 3 times a week while doses are being increased. Patients who complete Part 2 of the topiramate study may participate in another phase of the study that will last for 2 years. Those who continue for this phase will take topiramate for the 2-year period. They will be followed regularly by a study nurse and will come to NIH every 6 months for a follow-up visit.
NCT00003687 Treatment for Chronic Pain in Patients With Advanced CancerCompletedNCIC Clinical Trials GroupPhase 3 RATIONALE: Different drug formulations and combinations of drugs may help patients with chronic pain live more comfortably. It is not yet known which regimen is most effective for chronic pain. PURPOSE: Randomized phase III trial to compare the effectiveness of different morphine formulations with or without dextromethorphan in treating chronic pain in patients who have advanced cancer.
NCT00004807 Study of the Pathogenesis of Rett SyndromeCompletedJohns Hopkins UniversityN/A OBJECTIVES: I. Extend current knowledge of the phenotype and natural history of Rett syndrome (RS). II. Continue the search for a cytogenetic and/or DNA marker. III. Study the effects of cholinergic drugs based on preliminary evidence for reduced levels of brain acetylcholine, while continuing supportive care to modify seizures, respiratory abnormalities, and motor disturbances, and improve nutrition, behavior, and learning. IV. Identify targets for future therapeutic interventions, e.g., growth factors, to influence neurologic recovery.
NCT00004807 Study of the Pathogenesis of Rett SyndromeCompletedEunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)N/A OBJECTIVES: I. Extend current knowledge of the phenotype and natural history of Rett syndrome (RS). II. Continue the search for a cytogenetic and/or DNA marker. III. Study the effects of cholinergic drugs based on preliminary evidence for reduced levels of brain acetylcholine, while continuing supportive care to modify seizures, respiratory abnormalities, and motor disturbances, and improve nutrition, behavior, and learning. IV. Identify targets for future therapeutic interventions, e.g., growth factors, to influence neurologic recovery.
NCT00009542 Effects of Kava on the Body's Elimination of Caffeine and DextromethorphanCompletedNational Institutes of Health Clinical Center (CC)Phase 4 This study will examine how kava-a widely used herbal remedy-may affect the body's elimination of other medicines. Many people take kava to reduce anxiety or cause sedation. Since this product is considered a food supplement and not a drug, it is not subject to the rigorous pre-market testing required for prescription and over-the-counter (OTC) drugs. As a result, information has not been collected on possible interactions between kava and other medications. This study will look at how kava affects the elimination of caffeine-a compound commonly found in chocolate, coffee, tea and soft drinks-and dextromethorphan-an OTC cough suppressant. Normal healthy volunteers 21 years of age or older may be eligible for this 30-day study. Candidates will provide a medical history and undergo a physical examination and routine blood tests. Women of childbearing age will have a urine pregnancy test. Study participants will not drink alcoholic beverages or take any medications (except those given in the study) for 2 weeks prior to the study and throughout its duration. In addition, they will abstain from caffeine, grapefruit and grapefruit juice and charbroiled foods for at least 72 hours before and throughout each study day that urine is collected. On day 1 of the study, study subjects will take one dose each of caffeine and dextromethorphan at 4:00 P.M.. They will empty their bladder before the dosing and then collect all their urine after the dosing for the rest of the day and including the next mornings first urine. They will bring the urine samples to the Clinical Center when the collection is complete. This procedure will be repeated 1 week later (study day 8). After the second urine collection is completed, subjects will take 200 milligrams of kava 3 times a day for 21 days. On study day 29 (after 21 days of kava), subjects will repeat the dextromethorphan and caffeine dosing and urine collection described above, while continuing to take kava. Subjects will have an electroencephalograph (EEG) done before starting kava and again at the end of kava (study day 30). For this procedure, several electrodes (metal cups attached to wires) are secured to the scalp with a glue-like substance. A conductive gel fills the space between the electrode and the scalp to ensure good contact. The electrodes will remain in place for about 2 hours and then removed. The subject lies quietly on a bed during the EEG recording. Participation in the study will end with another physical examination and blood tests following the second EEG and urine collection.
NCT00011635 The Effect of Milk Thistle on the Pharmacokinetics of IndinavirCompletedNational Institutes of Health Clinical Center (CC)Phase 1 Complementary and alternative medicines are widely used in the HIV-infected population. Recent data have shown serious drug interactions between certain complementary medicines and protease inhibitors. Silymarin (Milk thistle) is a commonly used dietary supplement in HIV-infected patients for treatment of hepatitis or as a hepato-protectant. Data are available suggesting that it may alter cytochrome P4503A4-mediated drug metabolism. To evaluate the effect of milk thistle on the protease inhibitor, indinavir (IDV), ten healthy subjects will receive IDV (Crixivan) alone and in combination with an over-the-counter silymarin preparation. IDV will initially be administered alone at a dose of 800 mg Q8H for four doses and serial samples will be collected for determination of IDV pharmacokinetics after the morning dose on day 2. Subjects will then initiate therapy will milk thistle using a standardized formulation and dose for three weeks after which subjects will then again take 4 doses of IDV and have serial samples collected for IDV plasma concentrations. There will then be a 11-day washout period with no drugs, after which IDV will again be given for 4 doses and samples will be collected evaluate the offset of the effects of milk thistle. To examine the effect of milk thistle on other CYP450 pathways, subjects will receive a single dose of caffeine and dextromethorphan and have urine collected before and after milk thistle, and after the washout period. Indinavir, caffeine, and dextromethorphan concentrations in plasma or urine will be determined using validated HPLC methods. Steady-state noncompartmental parameters of indinavir in the presence and absence of milk thistle will be determined. Pharmacokinetic parameters will be compared using ANOVA that will include factors for a period effect and a treatment effect. Statistical analyses will include calculation of the mean ratio of the AUC in the treatment phases compared to IDV alone and determination of 95% confidence intervals. This study will help define the drug interaction potential of complementary and alternative therapies in HIV-infected patients.
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Conditions

Condition Name

Condition Name for DEXTROMETHORPHAN POLISTIREX
Intervention Trials
Healthy 18
Pain 7
Schizophrenia 4
Rett Syndrome 4
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Condition MeSH

Condition MeSH for DEXTROMETHORPHAN POLISTIREX
Intervention Trials
Alzheimer Disease 7
Neuralgia 6
Syndrome 6
Disease 5
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Trial Locations

Trials by Country

Trials by Country for DEXTROMETHORPHAN POLISTIREX
Location Trials
United States 294
Canada 9
Brazil 6
Argentina 6
Taiwan 5
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Trials by US State

Trials by US State for DEXTROMETHORPHAN POLISTIREX
Location Trials
Maryland 20
Florida 20
California 19
Texas 17
New York 16
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Clinical Trial Progress

Clinical Trial Phase

Clinical Trial Phase for DEXTROMETHORPHAN POLISTIREX
Clinical Trial Phase Trials
Phase 4 18
Phase 3 12
Phase 2/Phase 3 2
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Clinical Trial Status

Clinical Trial Status for DEXTROMETHORPHAN POLISTIREX
Clinical Trial Phase Trials
Completed 81
Recruiting 13
Unknown status 8
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Clinical Trial Sponsors

Sponsor Name

Sponsor Name for DEXTROMETHORPHAN POLISTIREX
Sponsor Trials
Avanir Pharmaceuticals 19
Boehringer Ingelheim 6
National Cheng-Kung University Hospital 5
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Sponsor Type

Sponsor Type for DEXTROMETHORPHAN POLISTIREX
Sponsor Trials
Other 76
Industry 71
NIH 25
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Serving leading biopharmaceutical companies globally:

Deloitte
Mallinckrodt
Baxter
Argus Health
McKinsey
McKesson
Citi
Fuji
Farmers Insurance
Cipla

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