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CompletedNCT00163046Updated Feb 2, 2021

A 28-Day Polysomnographic Study of Gabapentin in Transient Insomnia Induced by a Sleep Phase Advance

A Phase 3 interventional study of Gabapentin and Placebo in Transient Insomnia, sponsored by Pfizer's Upjohn has merged with Mylan to form Viatris Inc.. Completed at 3 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
256
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to to assess the effect of gabapentin compared to placebo on sleep, using polysomnography along with subjective sleep assessments, in subjects with transient insomnia induced by a sleep phase advance.

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 256 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

  • 18 years of age or older with occasional sleeplessness in the month prior to screening

Exclusion criteria

Exclusion Criteria:

  • Current treatment for, or recent history (within 2 years) of, a sleeping disorder including excessive snoring, obstructive sleep apnea or a chronic painful condition that interferes with the subject's sleep
  • Currently taking or expected to take any of the following during trial: amphetamines, benzodiazepines, cocaine, marijuana, methaqualone, methadone, opiates, propoxyphene, barbiturates, and phencyclidine during their participation in the trial
05

Study design

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

Study arms

  • Experimental
    Gabapentin

    Drug: Gabapentin

  • Placebo comparator
    Placebo

    Drug: Placebo

Interventions

  • DrugGabapentin

    Gabapentin 250 mg oral capsule 30 minutes prior to bedtime for 28 days

  • DrugPlacebo

    Matched placebo 30 minutes prior to bedtime for 28 days

06

What researchers measure

Primary outcomes

  1. Polysomnographic (PSG) measurement of Wake after Persistent Sleep Onset (WAPSO)

    Time frame: Day 1

Secondary outcomes

  1. PSG WAPSO

    Time frame: Day 28

  2. PSG Latency to Persistent Sleep (LPS)

    Time frame: Days 1 and 28

  3. PSG Sleep Onset Latency (SOL)

    Time frame: Days 1 and 28

  4. PSG Number of Awakenings (NAW)

    Time frame: Days 1 and 28

  5. PSG Wake after Sleep Onset (WASO)

    Time frame: Days 1 and 28

  6. PSG Total Wake Time (TWT) plus Stage 1 Sleep

    Time frame: Days 1 and 28

  7. PSG Wake Time During Sleep (WTDS)

    Time frame: Days 1 and 28

  8. PSG Total Sleep Time (TST)

    Time frame: Days 1 and 28

  9. PSG Sleep Efficiency (SE)

    Time frame: Days 1 and 28

  10. PSG Percent of Stages 1, 2, 3, 4 and REM sleep

    Time frame: Days 1 and 28

  11. PSG Percent Slow Wave Sleep (SWS, Stages 3&4 combined)

    Time frame: Days 1 and 28

  12. Subjective SL

    Time frame: Days 1 and 28

  13. Subjective NA

    Time frame: Days 1 and 28

  14. Subjective WASO

    Time frame: Days 1 and 28

  15. Subjective TST

    Time frame: Days 1 and 28

  16. Subjective ASR

    Time frame: Days 1 and 28

  17. Subjective ASQ

    Time frame: Days 1 and 28

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

    Time frame: Days 1 and 28

  19. KSD individual scores

    Time frame: Days 1 and 28

  20. Vital signs

    Time frame: Days 1 and 28

  21. Adverse events

    Time frame: Through Day 32

07

Study locations

3 sites
  • Pfizer Investigational Site
    Glendale, California 91206, United States
  • Pfizer Investigational Site
    San Diego, California 92123, United States
  • Pfizer Investigational Site
    Overland Park, Kansas 66212, United States
08

References and documents

Publications

  • Furey SA, Hull SG, Leibowitz MT, Jayawardena S, Roth T. A randomized, double-blind, placebo-controlled, multicenter, 28-day, polysomnographic study of gabapentin in transient insomnia induced by sleep phase advance. J Clin Sleep Med. 2014 Oct 15;10(10):1101-9. doi: 10.5664/jcsm.4110. PubMed 25317091 ↗
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
NCT00163046
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Responsible party
Sponsor
First posted
Sep 13, 2005
Start date
Oct 2005
Completion
Apr 2006
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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