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Completed Phase 3 Interventional

A Study of the Safety of Gabapentin in a Potential Over-the-Counter Population With Occasional Sleeplessness

ClinicalTrials.gov ID: NCT00666575

Public ClinicalTrials.gov record NCT00666575. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Oct 19, 2026, 10:28 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Randomized, Double-Blind, Placebo-Controlled, Multicenter, Actual Use Study of the Safety and Tolerability of Gabapentin 500 mg in a Potential OTC Population

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

The purpose of this study is to assess the safety of gabapentin, as compared to placebo, in a potential over-the-counter population with reports of occasional sleeplessness

Study identification

NCT ID
NCT00666575
Recruitment status
Completed
Study type
Interventional
Phase
Phase 3
Enrollment
2,105 participants

Conditions and interventions

Interventions

Drug

Eligibility (public fields only)

Age range
12 Years and older
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Dec 2004 (Type not available)
Primary completion
Not listed
Completion
May 2005 (Actual)
Last update posted
Feb 2, 2021

2004 – 2005

United States locations

U.S. sites
23
U.S. states
12
U.S. cities
20
Facility City State ZIP Site status
Pfizer Investigational Site Mobile Alabama 36608 —
Pfizer Investigational Site Phoenix Arizona 85018 —
Pfizer Investigational Site Beverly Hills California 90211 —
Pfizer Investigational Site San Francisco California 94102 —
Pfizer Investigational Site Clearwater Florida 33765 —
Pfizer Investigational Site DeLand Florida 32720 —
Pfizer Investigational Site New Port Richey Florida 34652 —
Pfizer Investigational Site Pembroke Pines Florida 33024 —
Pfizer Investigational Site West Palm Beach Florida 33409 —
Pfizer Investigational Site Atlanta Georgia 30328 —
Pfizer Investigational Site Boise Idaho 83704 —
Pfizer Investigational Site Boise Idaho 83712 —
Pfizer Investigational Site Indianapolis Indiana 46250 —
Pfizer Investigational Site Las Vegas Nevada 89104 —
Pfizer Investigational Site Las Vegas Nevada 89128 —
Pfizer Investigational Site Santa Fe New Mexico 87505 —
Pfizer Investigational Site Nashville Tennessee 37203 —
Pfizer Investigational Site Austin Texas 78705 —
Pfizer Investigational Site Fort Worth Texas 76135 —
Pfizer Investigational Site San Antonio Texas 78205 —
Pfizer Investigational Site San Antonio Texas 78229 —
Pfizer Investigational Site Salt Lake City Utah 84102 —
Pfizer Investigational Site West Jordan Utah 84088 —

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT00666575, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Feb 2, 2021 · Synced Oct 19, 2026

Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.

Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT00666575 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →