A Long-Term Study To Evaluate Safety And Efficacy Of Pregabalin For Postherpetic Neuralgia

July 30, 2021 updated by: Pfizer's Upjohn has merged with Mylan to form Viatris Inc.

A LONG-TERM STUDY TO EVALUATE SAFETY AND EFFICACY STUDY OF PREGABALIN IN THE TREATMENT OF POSTHERPETIC NEURALGIA.

To evaluate the safety of the long-term use of pregabalin.

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.
126

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 3

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

  • Japan
      • Fukuoka, Japan, 812-0011
        • Mukai Clinic
      • Fukuoka, Japan, 814-0001
        • KM Pain Clinic
      • Fukushima, Japan, 960-8044
        • Otsuki Sleep Clinic
      • Saitama, Japan, 330-0805
        • Hasumi Pain Clinic
    • Aichi
      • Nagoya, Aichi, Japan, 460-0001
        • National Hospital Organization Nagoya Medical Center
    • Chiba
      • Urayasu, Chiba, Japan, 279-0012
        • Kobayashi Clinic
    • Fukuoka
      • Kasuya-gun, Fukuoka, Japan, 811-2122
        • Okabe Hospital
    • Gunma
      • Maebashi, Gunma, Japan, 379-2147
        • Gunma Pain Clinic Hospital
      • Takasaki, Gunma, Japan, 370-0035
        • Takasaki Pain Clinic
    • Hokkaido
      • Asahikawa, Hokkaido, Japan, 070-0034
        • Asahikawa Pain Clinic Hospital
      • Asahikawa, Hokkaido, Japan, 070-8013
        • Kamui Pain Clinic
      • Sapporo, Hokkaido, Japan, 001-0045
        • Sapporo Asabu Clinic
      • Sapporo, Hokkaido, Japan, 003-8585
        • Higashi Sapporo Hospital
    • Hyogo
      • Akashi, Hyogo, Japan, 673-0016
        • Seimei Clinic
      • Amagasaki, Hyogo, Japan, 661-0012
        • Uchida Pain Relief Clinic
      • Himeji, Hyogo, Japan, 670-8520
        • National Hospital Organization Himeji Medical Center
      • Kobe, Hyogo, Japan, 654-0155
        • National Hospital Organization Kobe Medical Center
      • Kobe, Hyogo, Japan, 655-0854
        • Nakamura Clinic
    • Kanagawa
      • Sagamihara, Kanagawa, Japan, 228-8522
        • National Hospital Organization Sagamihara National Hospital
      • Yokohama, Kanagawa, Japan, 245-8575
        • National Hospital Organization Yokohama Medical Center
      • Yokohama, Kanagawa, Japan, 227-0043
        • Suzuki Pain Clinic
      • Yokohama, Kanagawa, Japan, 236-0037
        • Hajiri Pain Clinic
    • Miyagi
      • Sendai, Miyagi, Japan, 983-0036
        • Sendai Pain Clinic
    • Ohita
      • Beppu, Ohita, Japan, 874-0937
        • Nakamura Hospital
    • Saitama
      • Kawaguchi, Saitama, Japan, 332-0031
        • Kawaguchi Kogyo General Hospital
      • Tokorozawa, Saitama, Japan, 359-0038
        • Kinoshita Clinic
    • Tokyo
      • Arakawa-ku, Tokyo, Japan, 116-8567
        • Tokyo Women's Medical University Center East
      • Bunkyo-ku, Tokyo, Japan, 113-8431
        • Juntendo University Hospital
      • Mitaka, Tokyo, Japan, 181-0013
        • Mitaka Pain Clinic
      • Nakano-ku, Tokyo, Japan, 165-0027
        • Toriumi Pain Clinic
      • Shinagawa-ku, Tokyo, Japan, 141-0022
        • Kanto Medical NTT East Corporation
      • Shinagawa-ku, Tokyo, Japan, 141-0022
        • Naganuma Pain Clinic
      • Shinjuku-ku, Tokyo, Japan, 162-8666
        • Tokyo Women's Medical University Hospital

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:

  • Patients who completed the 13-week treatment of postherpetic neuralgia in Study A0081120.
  • Patients must be able to understand and cooperate with study procedures and have signed a written informed consent prior to entering the study.

Exclusion Criteria:

  • Patients who experienced serious adverse events in the preceding study (A0081120) that were determined by the investigator or the study sponsor to be causally related to the study medication.
  • Patients exhibiting treatment non-compliance in the preceding study (A0081120)

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: Non-Randomized
  • Masking: None (Open Label)

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: pregabalin
Drug: pregabalin
Dosage: 150-600 mg/day (75-300 mg bid), oral administration, Treatment duration: 52 weeks

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
Measure Description
Time Frame
Summary of Adverse Events
Time Frame: 52 weeks
Number of subjects with all causality adverse events, serious adverse events, severe adverse events, adverse events resulted in discontinuation, dose reduced or temporary discontinuation. Subjects are counted only once per treatment in each row.
52 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
Measure Description
Time Frame
Short-Form McGill Pain Questionnaire the Efficacy of Change: Sensory Score
Time Frame: 52 weeks
Score ranges: 0-33. Higher scores indicate more severe pain. Baseline: The last evaluation on or before Day 1 of double-blind for subjects that took pregabalin in double-blind and last visit <= Day 1 of open-label for subjects that took placebo in double-blind. Endpoint: The last evaluation during dose adjustment/maintenance step of open-label.
52 weeks
Short-Form McGill Pain Questionnaire the Efficacy of Change: Affective Score
Time Frame: 52 weeks
Score ranges: 0-12. Higher scores indicate more severe pain. Baseline: The last evaluation on or before Day 1 of double-blind for subjects that took pregabalin in double-blind and last visit <= Day 1 of open-label for subjects that took placebo in double-blind. Endpoint: The last evaluation during dose adjustment/maintenance step of open-label.
52 weeks
Short-Form McGill Pain Questionnaire the Efficacy of Change: Total Score
Time Frame: 52 weeks
Score ranges: 0-45. Higher scores indicate more severe pain. Baseline: The last evaluation on or before Day 1 of double-blind for subjects that took pregabalin in double-blind and last visit <= Day 1 of open-label for subjects that took placebo in double-blind. Endpoint: The last evaluation during dose adjustment/maintenance step of open-label.
52 weeks
Short-Form McGill Pain Questionnaire the Efficacy of Change: Present Pain Intensity
Time Frame: 52 weeks
Score ranges: 0-5. Higher scores indicate more severe pain. Baseline: The last evaluation on or before Day 1 of double-blind for subjects that took pregabalin in double-blind and last visit <= Day 1 of open-label for subjects that took placebo in double-blind. Endpoint: The last evaluation during dose adjustment/maintenance step of open-label.
52 weeks
Short-Form McGill Pain Questionnaire the Efficacy of Change: Visual Analog Scale
Time Frame: 52 weeks
Ranges: 0-100 mm. Larger scale indicate more severe pain. Baseline: The last evaluation on or before Day 1 of double-blind for subjects that took pregabalin in double-blind and last visit <= Day 1 of open-label for subjects that took placebo in double-blind. Endpoint: The last evaluation during dose adjustment/maintenance step of open-label.
52 weeks

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's Upjohn has merged with Mylan to form Viatris Inc.

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 (Actual)

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.
January 12, 2007

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.
August 19, 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.
August 19, 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 18, 2007

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.
January 18, 2007

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.
January 19, 2007

Study Record Updates

Last Update Posted (Actual)

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.
August 27, 2021

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.
July 30, 2021

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.
July 1, 2021

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.
  • A0081121

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

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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