CClinicalTrials.gg
CompletedNCT00553280Updated Jan 25, 2021Results posted

A Long-Term Study To Evaluate Safety And Efficacy Of Pregabalin For Pain Associated With Diabetic Peripheral Neuropathy

A Phase 3 interventional study of pregabalin in Diabetic Neuropathy, Painful, sponsored by Pfizer's Upjohn has merged with Mylan to form Viatris Inc.. Completed at 27 sites in Japan. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-01-25.

Sponsored by Pfizer's Upjohn has merged with Mylan to form Viatris Inc. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
123
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to assess the safety and efficacy of the long-term use of pregabalin at doses up to 600 mg/day in patients with painful diabetic peripheral neuropathy who have completed 13 weeks of dosing in Study A0081163

02

Conditions studied

  • Diabetic Neuropathy, Painful
03

In context

Peripheral Nervous System Diseases

1,003 studies on the registry are indexed under Peripheral Nervous System Diseases; 177 are open to participants now.

This study's enrollment of 123 is above the median of 60 across 768 interventional studies indexed under Peripheral Nervous System Diseases.

Browse Peripheral Nervous System Diseases studies →

Lead sponsor

Pfizer's Upjohn has merged with Mylan to form Viatris Inc. is the lead sponsor of 431 studies on the registry; none are open to participants now.

Of its 9 completed or terminated interventional studies of FDA-regulated products, 8 (89%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients who completed the 13-week treatment of painful diabetic peripheral neuropathy in Study A0081163.
  • 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

Exclusion Criteria:

  • Patients who experienced serious adverse events in the preceding study (A0081163) 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 (A0081163)
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
123 participants (actual)

Study arms

  • Experimental
    pregabalin

    Drug: pregabalin

Interventions

  • Drugpregabalin

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

06

What researchers measure

Primary outcomes

  1. Summary of Adverse Events

    Number of participants with all causality adverse events, serious adverse events, severe adverse events, adverse events resulted in discontinuation, dose reduced or temporary discontinuation. Participants are counted only once per treatment in each row.

    Time frame: 53 weeks

Secondary outcomes

  1. Change From Baseline in Short-Form McGill Pain Questionnaire: Sensory Scores

    The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Sensory score ranges from 0-33. Higher scores indicate more severe pain.

    Time frame: From baseline to 52 weeks or study discontinuation (Study Endpoint)

  2. Change From Baseline in Short-Form McGill Pain Questionnaire: Affective Scores

    The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Affective score ranges from 0-12. Higher scores indicate more severe pain.

    Time frame: From baseline to 52 weeks or study discontinuation (Study Endpoint)

  3. Change From Baseline in Short-Form McGill Pain Questionnaire: Total Scores

    The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Total score ranges from 0-45. Higher scores indicate more severe pain.

    Time frame: From baseline to 52 weeks or study discontinuation (Study Endpoint)

  4. Change From Baseline in Short-Form McGill Pain Questionnaire: Visual Analogue Scale Scores

    The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Visual Analogue Scale Score ranges from 0-100 mm. Higher scores indicate more severe pain.

    Time frame: From baseline to 52 weeks or study discontinuation (Study Endpoint)

  5. Change From Baseline in Short-Form McGill Pain Questionnaire: Present Pain Intensity Scores

    The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Present pain intensity score ranges from 0-5. Higher scores indicate more severe pain.

    Time frame: From baseline to 52 weeks or study discontinuation (Study Endpoint)

07

Results

Posted Jan 5, 2011

Participant flow

Thirty-six (36) centers in Japan

Participant flow — Overall Study
MilestonePregabalin
Started123
Completed97
Not completed26
Withdrew: Adverse event19
Withdrew: Lack of efficacy3
Withdrew: Withdrawal by subject3
Withdrew: Physician decision1

Outcome measures

PrimarySummary of Adverse Events

Number of participants with all causality adverse events, serious adverse events, severe adverse events, adverse events resulted in discontinuation, dose reduced or temporary discontinuation. Participants are counted only once per treatment in each row.

Time frame:
53 weeks
Reported as:
Number · participants
Summary of Adverse Events
participantsPregabalin
Participants with adverse events114
Participants with serious adverse events21
Participants with severe adverse events7
Participants discontinued due to adverse events17
Dose reduced or temporary discontinuation43
SecondaryChange From Baseline in Short-Form McGill Pain Questionnaire: Sensory Scores

The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Sensory score ranges from 0-33. Higher scores indicate more severe pain.

Time frame:
From baseline to 52 weeks or study discontinuation (Study Endpoint)
Reported as:
Mean · score on scale
Change From Baseline in Short-Form McGill Pain Questionnaire: Sensory Scores
score on scalePregabalin
Change From Baseline in Short-Form McGill Pain Questionnaire: Sensory Scores-3.5 ± 5.1
SecondaryChange From Baseline in Short-Form McGill Pain Questionnaire: Affective Scores

The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Affective score ranges from 0-12. Higher scores indicate more severe pain.

Time frame:
From baseline to 52 weeks or study discontinuation (Study Endpoint)
Reported as:
Mean · score on scale
Change From Baseline in Short-Form McGill Pain Questionnaire: Affective Scores
score on scalePregabalin
Change From Baseline in Short-Form McGill Pain Questionnaire: Affective Scores-1.2 ± 2.4
SecondaryChange From Baseline in Short-Form McGill Pain Questionnaire: Total Scores

The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Total score ranges from 0-45. Higher scores indicate more severe pain.

Time frame:
From baseline to 52 weeks or study discontinuation (Study Endpoint)
Reported as:
Mean · score on scale
Change From Baseline in Short-Form McGill Pain Questionnaire: Total Scores
score on scalePregabalin
Change From Baseline in Short-Form McGill Pain Questionnaire: Total Scores-4.7 ± 6.8
SecondaryChange From Baseline in Short-Form McGill Pain Questionnaire: Visual Analogue Scale Scores

The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Visual Analogue Scale Score ranges from 0-100 mm. Higher scores indicate more severe pain.

Time frame:
From baseline to 52 weeks or study discontinuation (Study Endpoint)
Reported as:
Mean · mm
Change From Baseline in Short-Form McGill Pain Questionnaire: Visual Analogue Scale Scores
mmPregabalin
Change From Baseline in Short-Form McGill Pain Questionnaire: Visual Analogue Scale Scores-25.4 ± 26.4
SecondaryChange From Baseline in Short-Form McGill Pain Questionnaire: Present Pain Intensity Scores

The mean change from baseline in Short-Form McGill Pain Questionnaire Scores at study endpoint. Present pain intensity score ranges from 0-5. Higher scores indicate more severe pain.

Time frame:
From baseline to 52 weeks or study discontinuation (Study Endpoint)
Reported as:
Mean · score on scale
Change From Baseline in Short-Form McGill Pain Questionnaire: Present Pain Intensity Scores
score on scalePregabalin
Change From Baseline in Short-Form McGill Pain Questionnaire: Present Pain Intensity Scores-0.7 ± 1.1

Adverse events

Collected over 53 weeks. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Pregabalin—21/123 (17.1%)101/123 (82.1%)
Most frequent serious events
Showing 10 of 21
Most frequent serious events
EventPregabalin
PneumoniaInfections and infestations3/123
CellulitisInfections and infestations2/123
Cerebral infarctionNervous system disorders2/123
Atrioventricular block completeCardiac disorders1/123
Meniere's diseaseEar and labyrinth disorders1/123
Diabetic gangreneInfections and infestations1/123
Femoral neck fractureInjury, poisoning and procedural complications1/123
Femur fractureInjury, poisoning and procedural complications1/123
Hand fractureInjury, poisoning and procedural complications1/123
Thermal burnInjury, poisoning and procedural complications1/123
Most frequent other events
Showing 10 of 16
Most frequent other events
EventPregabalin
NasopharyngitisInfections and infestations39/123
Weight increasedInvestigations35/123
SomnolenceNervous system disorders30/123
DizzinessNervous system disorders29/123
Oedema peripheralGeneral disorders21/123
FallInjury, poisoning and procedural complications14/123
ConstipationGastrointestinal disorders11/123
Face oedemaGeneral disorders10/123
EczemaSkin and subcutaneous tissue disorders10/123
Diabetic retinopathyEye disorders9/123

Baseline characteristics

Age, Customized
Age, Customized(participants)Pregabalin
< 18 years0
18 - 44 years6
45 - 64 years71
>= 65 years46
Age, Customized
Age, Customized(years)Pregabalin
Mean61.7 ± 10.0
Sex: Female, Male
Sex: Female, Male(Participants)Pregabalin
Female23
Male100
08

Study locations

27 sites
  • Pfizer Investigational Site
    Nagoya, Aichi, Japan
  • Pfizer Investigational Site
    Date-shi, Fukushima, Japan
  • Pfizer Investigational Site
    Nihonmatsu, Fukushima, Japan
  • Pfizer Investigational Site
    Shirakawa-shi, Fukushima, Japan
  • Pfizer Investigational Site
    Sukagawa, Fukushima, Japan
  • Pfizer Investigational Site
    Kamakura, Kanagawa, Japan
  • Pfizer Investigational Site
    Yokohama, Kanagawa, Japan
  • Pfizer Investigational Site
    Sendai, Miyagi, Japan
  • Pfizer Investigational Site
    Matsumoto, Nagano, Japan
  • Pfizer Investigational Site
    Ueda, Nagano, Japan
  • Pfizer Investigational Site
    Beppu, Oita, Japan
  • Pfizer Investigational Site
    Yamada, Okayama, Japan
  • Pfizer Investigational Site
    Naha, Okinawa, Japan
  • Pfizer Investigational Site
    Tomishiro, Okinawa, Japan
  • Pfizer Investigational Site
    Urazoe, Okinawa, Japan
  • Pfizer Investigational Site
    Hirano-ku, Osaka, Japan
  • Pfizer Investigational Site
    Suminoe-ku, Osaka, Japan
  • Pfizer Investigational Site
    Sunto-gun, Shizuoka, Japan
  • Pfizer Investigational Site
    Oyama-shi, Tochigi, Japan
  • Pfizer Investigational Site
    Arakawa, Tokyo, Japan
  • Pfizer Investigational Site
    Bunkyo-ku, Tokyo, Japan
  • Pfizer Investigational Site
    Chiyoda-ku, Tokyo, Japan
  • Pfizer Investigational Site
    Ohta-ku, Tokyo, Japan
  • Pfizer Investigational Site
    Shibuya-ku, Tokyo, Japan
  • Pfizer Investigational Site
    Fukuoka, Japan
  • Pfizer Investigational Site
    Oita, Japan
  • Pfizer Investigational Site
    Tokushima, Japan
09

References and documents

Publications

  • Satoh J, Yagihashi S, Baba M, Suzuki M, Arakawa A, Yoshiyama T. Efficacy and safety evaluation of pregabalin treatment over 52 weeks in patients with diabetic neuropathic pain extended after a double-blind placebo-controlled trial. J Diabetes Investig. 2011 Nov 30;2(6):457-63. doi: 10.1111/j.2040-1124.2011.00122.x. PubMed 24843530 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 25, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00553280
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Responsible party
Sponsor
First posted
Nov 4, 2007
Start date
Feb 2008
Primary completion
Jan 2010
Completion
Jan 2010
Results posted
Jan 5, 2011
Last update
Jan 25, 2021

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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