CClinicalTrials.gg
CompletedNCT00666770Updated Feb 2, 2021

A Polysomnographic Study of Single-Dose Gabapentin in Transient Insomnia Induced by a Sleep Phase Advance

A Phase 3 interventional study of Gabapentin and Gabapentin in Transient Insomnia, sponsored by Pfizer's Upjohn has merged with Mylan to form Viatris Inc.. Completed at 5 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-02-02.

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
309
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to assess the effect of gabapentin as compared to placebo on sleep in subjects with transient insomnia.

02

Conditions studied

  • Transient Insomnia
03

In context

Sleep Initiation and Maintenance Disorders

1,856 studies on the registry are indexed under Sleep Initiation and Maintenance Disorders; 594 are open to participants now.

This study's enrollment of 309 is above the median of 73 across 1,631 interventional studies indexed under Sleep Initiation and Maintenance Disorders.

Browse Sleep Initiation and Maintenance Disorders 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

  • Aged >/= 18 years
  • Females of child-bearing potential using medically-acceptable method of birth control >/= 1 month prior to screening

Exclusion criteria

Exclusion Criteria:

  • Current or recent history (within 2 years) of sleep disorder (excessive snoring, obstructive sleep apnea, chronic painful condition)
  • Recreational drug use within past 30 days
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
309 participants (actual)

Study arms

  • Experimental
    Gabapentin 250 mg

    Drug: Gabapentin

  • Experimental
    Gabapentin 500 mg

    Drug: Gabapentin

  • Placebo comparator
    Placebo

    Drug: Placebo

Interventions

  • DrugGabapentin

    Gabapentin 250 mg oral capsule 30 minutes prior to bedtime

  • DrugGabapentin

    Gabapentin 500 mg oral capsule 30 minutes prior to bedtime

  • DrugPlacebo

    Matched placebo 30 minutes prior to bedtime

06

What researchers measure

Primary outcomes

  1. Latency to persistent sleep as measured by polysomnography

    Time frame: Hour +8

Secondary outcomes

  1. Subjective wake after sleep onset

    Time frame: Hour +8

  2. Subjective total sleep time

    Time frame: Hour +8

  3. Subjective assessment of sleep refreshment

    Time frame: Hour +8

  4. Subjective assessment of sleep quality

    Time frame: Hour +8

  5. Stanford Sleepiness Scale

    Time frame: Hour +13

  6. Karolinska Sleep Diary-Sleep (KSD) Quality Index

    Time frame: Hour +8

  7. KSD individual scores

    Time frame: Hour +8

  8. Digit Symbol Substitution Test

    Time frame: Hour +8

  9. Latency to REM sleep

    Time frame: Hour +8

  10. Number of awakenings

    Time frame: Hour +8

  11. Wake after sleep onset

    Time frame: Hour +8

  12. Total wake time plus Stage 1 sleep

    Time frame: Hour +8

  13. Total sleep time

    Time frame: Hour +8

  14. Sleep efficiency

    Time frame: Hour +8

  15. Percent of Stages 1, 2, 3, 4 (non-REM) and REM sleep

    Time frame: Hour +8

  16. Buschke Selective Reminding Test (immediate recall score, long term storage score, total number of intrusions, delayed recall score)

    Time frame: Hour +8

  17. Vital signs

    Time frame: Hour +8

  18. Adverse events

    Time frame: Hour +13

  19. Sleep onset latency

    Time frame: Hour +8

  20. Percent slow wave sleep (Stages 3&4 combined)

    Time frame: Hour +8

  21. Subjective sleep latency

    Time frame: Hour +8

  22. Subjective number of awakenings

    Time frame: Hour +8

07

Study locations

5 sites
  • Pfizer Investigational Site
    Glendale, California 91206, United States
  • Pfizer Investigational Site
    San Diego, California 92123, United States
  • Pfizer Investigational Site
    Overland Park, Kansas 66211, United States
  • Pfizer Investigational Site
    Overland Park, Kansas 66212, United States
  • Pfizer Investigational Site
    New York, New York 10025, United States
08

References and documents

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 2, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00666770
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Responsible party
Sponsor
First posted
Apr 25, 2008
Start date
Oct 2004
Completion
Nov 2004
Last update
Feb 2, 2021

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer

Oversight

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

Not currently enrolling

This study is completed, as verified in Apr 2008. You cannot join it, but the record below documents what was studied.

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