PH-797804 Versus Placebo For The Treatment Of Neuropathic Pain Associated With Post-Herpetic Neuralgia

May 9, 2011 updated by: Pfizer

A Four Week, Multi-Center, Randomized, Double-Blind, Placebo-Controlled, Parallel-Group, Phase 2A Study Of PH-797804 In The Treatment Of Post-Herpetic Neuralgia

This is a proof-of-concept study to determine if PH-797804 reduces neuropathic pain associated with post-herpetic neuralgia. Suitable patients will be randomized to receive either PH-797804 or placebo for 4 weeks, during which time they will also record their pain symptoms using various pain scales.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
80

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Chile
    • V Region
      • Vina del Mar, V Region, Chile, 2520997
        • Pfizer Investigational Site
  • Russian Federation
      • Moscow, Russian Federation, 123098
        • Pfizer Investigational Site
      • St. Petersburg, Russian Federation, 194175
        • Pfizer Investigational Site
      • St. Petersburg, Russian Federation, 194354
        • Pfizer Investigational Site
      • Yaroslavl, Russian Federation, 150030
        • Pfizer Investigational Site
  • Spain
      • Cadiz, Spain, 11009
        • Pfizer Investigational Site
      • Madrid, Spain, 28006
        • Pfizer Investigational Site
      • Ourense, Spain, 32005
        • Pfizer Investigational Site
      • Sevilla, Spain, 41013
        • Pfizer Investigational Site
      • Valencia, Spain, 46014
        • Pfizer Investigational Site
  • Sweden
      • Linkoping, Sweden, 581 85
        • Pfizer Investigational Site
      • Stockholm, Sweden, 114 54
        • Pfizer Investigational Site
      • Stockholm, Sweden, 115 22
        • Pfizer Investigational Site
  • Ukraine
      • Dnipropetrovsk, Ukraine, 49616
        • Pfizer Investigational Site
      • Donetsk, Ukraine, 83045
        • Pfizer Investigational Site
      • Kharkiv, Ukraine, 61052
        • Pfizer Investigational Site
      • Kharkiv, Ukraine, 61068
        • Pfizer Investigational Site
      • Kharkiv, Ukraine, 61178
        • Pfizer Investigational Site
      • Kyiv, Ukraine, 04050
        • Pfizer Investigational Site
      • Odessa, Ukraine, 65025
        • Pfizer Investigational Site
      • Simferopol, Ukraine, 95006
        • Pfizer Investigational Site
  • United Kingdom
      • Solihull, United Kingdom, B91 2JL
        • Pfizer Investigational Site
    • East Sussex
      • Bexhill on Sea, East Sussex, United Kingdom, TN40 1JJ
        • Pfizer Investigational Site
    • Lancashire
      • Blackpool, Lancashire, United Kingdom, FY3 7EN
        • Pfizer Investigational Site
    • Surrey
      • Weybridge, Surrey, United Kingdom, KT15 2BH
        • Pfizer Investigational Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Male or female, at least 18 years of age
  • Patients must have pain present for more than 3 months after healing of the Herpes zoster skin rash. There is no upper limit on the duration of PHN.
  • Patients at screening visit (V1) must have a score ≥40 mm on the Pain Visual Analog Score (VAS).

Exclusion Criteria:

  • Patients having other severe pain, which may impair the self-assessment of the pain due to post-herpetic neuralgia
  • History within the previous year of: myocardial infarction, cardiac arrhythmia (e.g. atrial fibrillation, paroxysmal atrial fibrillation, atrial flutter, supraventricular tachycardia, ventricular tachycardia), left ventricular failure, New York Heart Association (NYHA) Class III-IV congestive heart failure requiring treatment, unstable angina, coronary angioplasty, coronary artery bypass grafting (CABG) or cerebrovascular accident (including transient ischemic attacks).
  • Tuberculosis without treatment and/or positive tuberculin reaction to PPD (Purified Protein Derivative) without known (documented) vaccination with the bacilli Calmette-Guerin vaccine (BCG).
  • A positive approved immunoassay/ELISA blood test for TB (e.g. TB T-SPOT™, QuantiFERON-Gold
  • Any clinically significant skin lesions as described in Common Terminology Criteria for Adverse Events for Dermatology (CTCAE) Version 3.0
  • ECG abnormalities at screening or randomization
  • Evidence of organ dysfunction or hematopoietic disorder

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: 1
Drug: PH-797804
6 mg dose in oral capsule form, once daily for 28 days
Placebo Comparator: 2
Drug: Placebo
oral capsule form, once daily for 28 days

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Change from baseline to endpoint in weekly average pain score using the 11-point daily pain rating scale
Time Frame: 4 weeks
4 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
PH-797804 pharmacokinetics
Time Frame: Weeks 1, 2, and 4
Weeks 1, 2, and 4
Patient global impression of change
Time Frame: Week 4
Week 4
Neuropathic Pain Symptom Inventory
Time Frame: Baseline and Weeks 1, 2, and 4
Baseline and Weeks 1, 2, and 4

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Pfizer

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 1, 2008

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2008

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2008

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 31, 2008

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 12, 2008

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 13, 2008

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 16, 2011

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 9, 2011

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2011

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • A6631013

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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