Study of NGX-4010 for the Treatment of Postherpetic Neuralgia

NCT00115310 | Completed Phase 3

• 1 other identifier: C116
• Study Type: interventional
• Target: 400
• Locations: 0 countries
• Sites: N/A

Brief Summary

The purpose of the study is to assess the efficacy and safety of NGX-4010 applied for 60 minutes for the treatment of postherpetic neuralgia (PHN).

Conditions

Peripheral Nervous System Diseases; Pain; Neuralgia; Herpes Zoster; Shingles

Keywords

dermal assessment; pain measurement; diary; PHN; shingles; neuropathy; analgesics; capsaicin; postherpetic neuralgia

Outcome Measures

Primary Outcomes (1)

• Percent change from baseline in "average pain for the past 24 hours" Numeric Pain Rating Scale (NPRS) score (i.e., average of scores during Weeks 2 to 8, compared to baseline) in the active group compared to the control group

Secondary Outcomes (10)

• Percent change from baseline in "average pain for the past 24 hours" NPRS score (i.e., average of scores during Weeks 2 to 4 and 2 to 12, respectively, compared to baseline) in the active group compared to the control group

• Proportion of subjects reaching 30% and 50% decrease, respectively, from baseline in "average pain for the past 24 hours" NPRS scores on average during Weeks 2 to 8

• Proportion of subjects reaching 30% and 50% decrease, respectively, from baseline in "average pain for the past 24 hours" NPRS scores on average during Weeks 2 to 4 and 2 to 12, respectively

• Median onset and mean duration of efficacy in days in the active group

• Proportion of subjects with significant changes in concomitant pain medication usage during Weeks 2 to 8, compared to baseline

Interventions

NGX-4010 DRUG

Eligibility Criteria

• Age: 18 Years - 90 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Diagnosis of PHN, with at least 6 months of pain since shingles vesicle crusting
• Average NPRS scores for PHN-associated pain during screening period of 3 to 9
• Intact, unbroken skin over the painful area(s) to be treated
• If taking chronic pain medications, be on a stable (not PRN) regimen for at least 21 days prior to Study Patch Application Visit (Day 0) and willing to maintain medications at same stable dose(s) and schedule throughout study
• Female subjects with child-bearing potential must have a negative serum beta human chorionic gonadotropin (hCG) pregnancy test, within 7 days of Study Patch Application Visit
• All subjects must be willing to use effective methods of birth control and/or refrain from participating in a conception process during the study (or, in the event of early termination from the study, for 30 days following experimental drug exposure)
• Be willing and able to comply with protocol requirements for the duration of study participation.
• Subjects must sign an informed consent form for this study approved by the Investigator's Institutional Review Board/Independent Ethics Committee (IRB/IEC).

You may not qualify if:

• Concomitant opioid medication, unless orally or transdermally administered and not exceeding a total daily dose of morphine 60 mg/day, or equivalent. Parenteral opioid use is excluded, regardless of dose.
• Unavailability of an effective rescue medication strategy for the subject, such as unwillingness to use opioid analgesics during study treatment, or high tolerance to opioids precluding the ability to relieve treatment-associated discomfort, as judged by Investigator.
• Active substance abuse or history of chronic substance abuse within the past year, or prior chronic substance abuse (including alcoholism) judged likely to recur during the study period by Investigator.
• Recent use (within 21 days preceding the Study Patch Application Visit \[Day 0\]) of any topically applied pain medication, such as non-steroidal anti-inflammatory drugs, menthol, methyl salicylate, local anesthetics including Lidoderm (lidocaine patch 5%), steroids or capsaicin products on the painful areas.
• Participation in a previous NeurogesX clinical trial in which subject received NGX-4010 (either blinded or open-label study treatment).
• Current use of any investigational agent, or Class 1 anti-arrhythmic drugs (such as tocainide and mexiletine).
• Diabetes mellitus, unless well-controlled as evidenced by an HbA1c level less than or equal to 9%.
• Hypertension, unless adequately controlled by medication.
• Significant pain of an etiology other than PHN. Subjects must not have significant ongoing pain from other cause(s) that may interfere with judging PHN-related pain.
• Painful PHN areas located only on the face, above the hairline of the scalp, and/or in proximity to mucous membranes.
• Any implanted medical device (spinal cord stimulator, intrathecal pump or peripheral nerve stimulator) for the treatment of neuropathic pain.
• Hypersensitivity to capsaicin (i.e., chili peppers or OTC capsaicin products), local anesthetics, oxycodone hydrochloride, hydrocodone bitartrate or adhesives.
• Significant ongoing or untreated abnormalities in cardiac, renal, hepatic, or pulmonary function that may interfere either with the ability to complete the study or the evaluation of adverse events.
• Recent history of a significant medical-surgical intervention in the judgment of the Investigator.
• Evidence of cognitive impairment including dementia that may interfere with subject's ability to complete daily pain diaries requiring subject's recall of average PHN pain level in the past 24 hours.

Sponsors & Collaborators

• NeurogesX: lead

Related Publications (1)

• Backonja M, Wallace MS, Blonsky ER, Cutler BJ, Malan P Jr, Rauck R, Tobias J; NGX-4010 C116 Study Group. NGX-4010, a high-concentration capsaicin patch, for the treatment of postherpetic neuralgia: a randomised, double-blind study. Lancet Neurol. 2008 Dec;7(12):1106-12. doi: 10.1016/S1474-4422(08)70228-X. Epub 2008 Oct 30.

  PMID: 18977178 DERIVED

MeSH Terms

Conditions

Peripheral Nervous System Diseases; Pain; Neuralgia; Herpes Zoster; Neuralgia, Postherpetic

Interventions

Capsaicin

Condition Hierarchy (Ancestors)

Neuromuscular Diseases; Nervous System Diseases; Neurologic Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms; Varicella Zoster Virus Infection; Herpesviridae Infections; DNA Virus Infections; Virus Diseases; Infections

Intervention Hierarchy (Ancestors)

Polyunsaturated Alkamides; Amides; Organic Chemicals; Alkenes; Hydrocarbons, Acyclic; Hydrocarbons; Catechols; Phenols; Benzene Derivatives; Hydrocarbons, Aromatic; Hydrocarbons, Cyclic; Solanaceous Alkaloids; Alkaloids; Heterocyclic Compounds; Fatty Acids, Monounsaturated; Fatty Acids, Unsaturated; Fatty Acids; Lipids

Study Officials

• Jeffrey Tobias, MD

  NeurogesX

  STUDY DIRECTOR

Study Design

• Study Type: interventional
• Phase: phase 3
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY

Study Record Dates

• First Submitted: June 21, 2005
• First Posted: June 22, 2005
• Study Start: June 1, 2005
• Study Completion: October 1, 2006
• Last Updated: March 6, 2008

Record last verified: 2008-03