Study of Gabapentin Extended Release (G-ER) in the Treatment of Vasomotor (Hot Flashes/Hot Flushes) Symptoms in Postmenopausal Women

NCT ID: NCT00755417

Last Updated: 2012-03-07

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE3

Total Enrollment

541 participants

Study Classification

INTERVENTIONAL

Study Start Date

2008-09-30

Study Completion Date

2009-10-31

Brief Summary

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Depomed's Gabapentin Extended Release (G-ER) is an investigational, extended release formulation of gabapentin that is being studied for the treatment of hot flashes in postmenopausal women.

Detailed Description

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The primary study objective is to assess the efficacy of G-ER dosed in either of the following regimens:

* G-ER 1200 mg daily (single evening dose)
* G-ER 1800 mg daily (dosed asymmetrically; 600 mg in AM/1200 mg in PM) compared to placebo in reducing the average daily frequency and severity score of moderate to severe hot flashes in postmenopausal women after 4 weeks and 12 weeks of treatment with a stable dose, compared with the baseline week.

Conditions

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Hot Flashes

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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G-ER 1200 mg

Gabapentin extended-release (G-ER) 1200 mg

Group Type EXPERIMENTAL

Gabapentin Extended-Release (G-ER) 1200 mg

Intervention Type DRUG

G-ER 1200 mg daily dosage given as two 600-mg tablets.

G-ER 1800 mg

Gabapentin extended-release (G-ER) 1800 mg

Group Type EXPERIMENTAL

Gabapentin Extended-Release (G-ER) 1800 mg

Intervention Type DRUG

G-ER 1800 mg daily dosage given as one 600-mg tablet in the morning and two 600-mg tablets in the evening.

Sugar Pill

Placebo 1200 mg or 1800 mg

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Matching placebo dosages of 1200 mg daily (two 600-mg tablets) and 1800 mg daily (one 600-mg tablet in the morning and two 600-mg tablets in the evening).

Interventions

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Gabapentin Extended-Release (G-ER) 1200 mg

G-ER 1200 mg daily dosage given as two 600-mg tablets.

Intervention Type DRUG

Gabapentin Extended-Release (G-ER) 1800 mg

G-ER 1800 mg daily dosage given as one 600-mg tablet in the morning and two 600-mg tablets in the evening.

Intervention Type DRUG

Placebo

Matching placebo dosages of 1200 mg daily (two 600-mg tablets) and 1800 mg daily (one 600-mg tablet in the morning and two 600-mg tablets in the evening).

Intervention Type DRUG

Other Intervention Names

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Gabapentin Gabapentin

Eligibility Criteria

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Inclusion Criteria

1. Postmenopausal women aged 18 to 70 years experiencing ≥7 moderate to severe hot flashes per day (or ≥50 per week) accompanied by sweating during previous 30 days or longer.
2. Had amenorrhea for ≥12 months, amenorrhea for 6 to 12 months with serum follicle-stimulating hormone (FSH) levels \>40 mIU/mL, or was ≥6 weeks postsurgical bilateral oophorectomy with or without hysterectomy.
3. Willing to discontinue the following: vaginal hormonal products; transdermal or oral estrogen or estrogen/progestin combination; intrauterine progestin; progestin implants; injectable estrogen; topical progesterone cream.
4. Had to have daily average of ≥7 moderate to severe hot flashes and had to complete ≥4 days of diary entries during baseline week to be randomized.
5. If treated with antidepressants, could not have had any changes in drug doses during past month.

Other Inclusions apply.

Exclusion Criteria

1. Patient treated with a gonadotrophin releasing hormone agonist, anti-estrogens, or aromatase inhibitors within 2 months prior to study entry.
2. Patient treated with estrogen pellets or progestin injectable drugs within 6 months prior to study entry.
3. Patient experience only nighttime hot flashes or worked night shifts on a regular basis.
4. Patient was concurrently treated with gabapentin for other indications. If patient was using gabapentin for treatment of hot flashes, she could be screened after a 7-day washout period provided hot flashes returned.
5. Patient had previously experienced dose-limiting adverse events that prevented titration of gabapentin to an effective dose.
6. Patient had a hypersensitivity to gabapentin.
7. Patient was in an immunocompromised state.
8. Patient had a malignancy other than basal cell carcinoma within 2 years prior to study entry.
9. Patient had gastric reduction surgery, severe chronic diarrhea, chronic constipation, uncontrolled irritable bowel syndrome, uncontrolled inflammatory bowel disease, or unexplained weight loss.
10. Patient had clinically significant abnormal chemistry or hematology results, or calculated glomerular filtration rate \<60 mL/min.
11. Patient had history of substance abuse within year prior to study entry.
12. Patient was concurrently taking morphine.
13. Patient had history of chronic hepatitis B or C, hepatitis within 3 months prior to study entry, or history of human immunodeficiency virus.

Other Exclusions apply.
Minimum Eligible Age

18 Years

Maximum Eligible Age

70 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No

Sponsors

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Depomed

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Birmingham, Alabama, United States

Site Status

Montgomery, Alabama, United States

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Tempe, Arizona, United States

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Tucson, Arizona, United States

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Berkely, California, United States

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La Mesa, California, United States

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San Diego, California, United States

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Santa Rosa, California, United States

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Denver, Colorado, United States

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Lakewood, Colorado, United States

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Waterbury, Connecticut, United States

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Washington D.C., District of Columbia, United States

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Clearwater, Florida, United States

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Jacksonville, Florida, United States

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New Port Richey, Florida, United States

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Orlando, Florida, United States

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St. Petersburg, Florida, United States

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Tampa, Florida, United States

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Atlanta, Georgia, United States

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Sandy Springs, Georgia, United States

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Savannah, Georgia, United States

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Chicago, Illinois, United States

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Madisonville, Kentucky, United States

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Fall River, Massachusetts, United States

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Edina, Minnesota, United States

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St Louis, Missouri, United States

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Billings, Montana, United States

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Las Vegas, Nevada, United States

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Moorestown, New Jersey, United States

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Raleigh, North Carolina, United States

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Wilmington, North Carolina, United States

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Fargo, North Dakota, United States

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Columbus, Ohio, United States

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Pittsburgh, Pennsylvania, United States

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West Reading, Pennsylvania, United States

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Columbia, South Carolina, United States

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Hilton Head Island, South Carolina, United States

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Nashville, Tennessee, United States

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Dallas, Texas, United States

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Houston, Texas, United States

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San Antonio, Texas, United States

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Salt Lake City, Utah, United States

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Bellevue, Washington, United States

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Renton, Washington, United States

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Spokane, Washington, United States

Site Status

Countries

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United States

Other Identifiers

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81-0058

Identifier Type: -

Identifier Source: secondary_id

BREEZE 1

Identifier Type: -

Identifier Source: org_study_id

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