- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01760954
Study to Evaluate the Long-Term Safety and Efficacy of Elagolix in Adults With Moderate to Severe Endometriosis-Associated Pain
Extension Study to Evaluate the Long-Term Safety and Efficacy of Elagolix in Subjects With Moderate to Severe Endometriosis-Associated Pain
Study Overview
Detailed Description
This is a Phase 3 multicenter, double blind randomized study to assess the continued safety and efficacy of the 150 mg once daily (QD) and 200 mg twice daily (BID) doses of elagolix in premenopausal women with moderate to severe endometriosis-associated pain who completed the 6 month treatment period in the pivotal study M12-665 (NCT01620528). The study consists of 2 periods: a 6 month Treatment Period and a post treatment follow-up period of up to 12 months.
Participants who received elagolix in the pivotal study who met all entry criteria continued to receive the same dose, either elagolix 150 mg QD or elagolix 200 mg BID for up to an additional 6 months in this extension study; participants who received placebo in the pivotal study were randomized in a 1:1 ratio to receive either elagolix 150 mg QD or elagolix 200 mg BID for up to 6 months.
An electronic diary will be used to collect endometriosis-associated pain, uterine bleeding, and analgesic medication use for endometriosis associated pain on a daily basis.
All participants who prematurely discontinued treatment (unless pregnant or elected surgery for endometriosis) or completed the 6-month Treatment Period in this extension study were to enter the Post-treatment Follow-up (PTFU) Period within this study for up to 12 months.
Study Type
Enrollment (Actual)
Phase
- Phase 3
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Completed the 6 month Treatment Period in pivotal study M12-665 (NCT01620528)
- Agrees to use required birth control methods during the study through Month 6 of the Post-treatment Follow-up period
Exclusion Criteria:
- Clinically significant gynecological condition
- Bone mineral density (BMD) loss greater than or equal to 8 percent in the spine, femoral neck or total hip
- Plans to become pregnant in the next 18 months
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Elagolix 150 mg QD
Participants received elagolix 150 mg tablets once a day (QD) for 6 months.
|
Elagolix tablets administered orally
Other Names:
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Experimental: Elagolix 200 mg BID
Participants received elagolix 200 mg tablets twice a day (BID) for 6 months.
|
Elagolix tablets administered orally
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Percentage of Participants With a Response for Dysmenorrhea at Month 6 Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and Month 6
|
Response was defined as a reduction of -0.81 or more from baseline in dysmenorrhea (pain during menstruation) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a < 15% increase in average rescue analgesic pill count and no additional analgesic). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-665. Participants recorded rescue analgesic use for endometriosis-associated pain daily and dysmenorrhea and its impact on daily activities each day of their period in an electronic diary (e-Diary). Dysmenorrhea was assessed according to the following:
Analgesic use and pain scores were averaged over the 35 days prior to each visit. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and Month 6
|
Percentage of Participants With a Response for Non-menstrual Pelvic Pain at Month 6 Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and Month 6
|
Response was defined as a reduction of -0.36 or greater from baseline for non-menstrual pelvic pain as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a < 15% increase in average pill count of rescue analgesics and no additional analgesics). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-665. Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options:
Pain scores and analgesic use were averaged over the 35 days prior to each visit. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and Month 6
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Percentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5
|
Response was defined as a reduction of -0.81 or more from baseline in dysmenorrhea as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a < 15% increase in average pill count of rescue analgesics and no additional analgesic). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-665. Participants recorded rescue analgesic medication for endometriosis-associated pain daily and dysmenorrhea (pain during menstruation) and its impact on their daily activities each day of their period in an e-Diary. Dysmenorrhea was assessed according to the following:
Analgesic use and pain scores were averaged over the 35 days prior to each visit. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5
|
Percentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5
|
Response was defined as a reduction of -0.36 or greater from baseline for non-menstrual pelvic pain as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a < 15% increase in average pill count of rescue analgesics and no additional analgesics). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-665. Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options:
Pain scores and analgesic use were averaged over the 35 days prior to each visit. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5
|
Percentage of Participants With a Response for Dyspareunia at Each Month Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Response was defined as a reduction of -0.36 or more from baseline in dyspareunia (pain during sexual intercourse) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a < 15% increase in average rescue analgesic pill count and no additional analgesics). Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed dyspareunia each day in an e-Diary. Dyspareunia was assessed according to the following:
Pain scores and analgesic use were averaged over the 35 days prior to each visit. Responses of "Not Applicable" were excluded. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Percent Change From Baseline in Dysmenorrhea Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Participants assessed dysmenorrhea (pain during menstruation) and its impact on their daily activities each day of their period in an e-Diary according to the following response options:
Pain scores were averaged over the 35 days prior to each visit. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Percent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Participants assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options:
Pain scores were averaged over the 35 days prior to each visit. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Percent Change From Baseline in Dyspareunia Based on Daily Assessment
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Participants assessed dyspareunia each day in an e-Diary according to the following response options:
Pain scores were averaged over the 35 days prior to each visit. Responses of "Not Applicable" were excluded. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Change From Baseline in Any Rescue Analgesic Use
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, and/or codeine 30 mg + acetaminophen 300 mg).
Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period.
Any rescue analgesic use (NSAID and/or opioid) was calculated as the total number of pills divided by the number of days in the window (i.e.
average daily pill count) over the 35-day window prior to and including the reference study day.
|
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Change From Baseline in NSAID Rescue Analgesic Use
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, and/or codeine 30 mg + acetaminophen 300 mg).
Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period.
NSAID rescue analgesic use was calculated as the total number of NSAID pills divided by the number of days in the window (i.e.
average daily pill count) over the 35-day window prior to and including the reference study day.
|
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Change From Baseline in Opioid Rescue Analgesic Use
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, and/or codeine 30 mg + acetaminophen 300 mg).
Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period.
Opioid rescue analgesic use was calculated as the total number of opioid pills divided by the number of days in the window (i.e.
average daily pill count) over the 35-day window prior to and including the reference study day.
|
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Percent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
The NRS measured endometriosis-associated pain with and without menstruation on an 11-point scale from 0 = no pain to 10 = worst pain ever.
Participants were asked to assess their endometriosis pain over the past 24 hours at it's worst at approximately the same time every day in the e-Diary.
Pain scores were averaged over the 35 days prior to each visit.
|
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6
|
Percentage of Participants With a PGIC Response of Much Improved or Very Much Improved
Time Frame: Months 1, 2, 3, 4, 5, and 6
|
The Patient Global Impression of Change (PGIC) is a questionnaire-based assessment of the change in endometriosis pain since the initiation of study drug. The participant was asked to select from one of seven response categories:
|
Months 1, 2, 3, 4, 5, and 6
|
Change From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain Dimension
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 3, and 6
|
The EHP-30 is an instrument to measure health-related quality of life in women with endometriosis. The EHP-30 consists of two parts: a core questionnaire containing 5 scales that are applicable to all women with endometriosis and includes pain, control and powerlessness, emotional well-being, social support, and self-image, and a modular part containing 6 scales which do not necessarily apply to all women with endometriosis. Each question in the core questionnaire is scored on the following scale: 0 = Never, 1 = Rarely, 2 = Sometimes, 3 = Often, 4 = Always. The pain dimension consists of 11 questions. The dimension score ranges from 0 to 100, where 0 = best possible health status as measured by the questionnaire; 100 = worst possible health status. A negative change from baseline score indicates improvement in quality of life. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 3, and 6
|
Change From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse Dimension
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 3, and 6
|
The EHP-30 is an instrument to measure health-related quality of life in women with endometriosis. The EHP-30 consists of two parts: a core questionnaire containing 5 scales that are applicable to all women with endometriosis and a modular part containing 6 scales which do not necessarily apply to all women with endometriosis; only 1 modular questionnaire (sexual intercourse [5 items]) was used in this study. The Sexual Intercourse dimension consists of 5 questions, each answered on the following scale: 0 = Never, 1 = Rarely, 2 = Sometimes, 3 = Often, 4 = Always, or Not Applicable (not scored). The dimension score ranges from 0 to 100, where 0 = best possible health status as measured by the questionnaire; 100 = worst possible health status. A negative change from baseline score indicates improvement in quality of life. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and months 1, 3, and 6
|
Change From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and Household
Time Frame: Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and month 6
|
The HRPQ consists of 9 questions measuring the impact of endometriosis-associated pain and its treatment on work productivity and daily activities in the home. Absenteeism: Number of hours of intended work lost due to illness or treatment. Presenteeism: Number of hours of work where output was impacted by illness or treatments. Total hours lost is the sum of hours missed due to absenteeism plus presenteeism. |
Baseline (defined as baseline of Study M12-665 for participants who received elagolix in the pivotal study and baseline of the extension study M12-667 for participants who received placebo in the pivotal study) and month 6
|
Number of Participants With Non-study Health Visits During the Treatment Period
Time Frame: 6 months
|
The Health Resource Use Questionnaire (HRUQ) was used to collect information on non-study-related health visits that participants had during the study.
|
6 months
|
Number of Days in Hospital During the Treatment Period
Time Frame: 6 months
|
The Health Resource Use Questionnaire (HRUQ) was used to collect information on non-study-related health visits that participants had during the study, including physician visits, hospitalizations and types of procedures received.
|
6 months
|
Collaborators and Investigators
Sponsor
Publications and helpful links
General Publications
- Surrey E, Taylor HS, Giudice L, Lessey BA, Abrao MS, Archer DF, Diamond MP, Johnson NP, Watts NB, Gallagher JC, Simon JA, Carr BR, Dmowski WP, Leyland N, Singh SS, Rechberger T, Agarwal SK, Duan WR, Schwefel B, Thomas JW, Peloso PM, Ng J, Soliman AM, Chwalisz K. Long-Term Outcomes of Elagolix in Women With Endometriosis: Results From Two Extension Studies. Obstet Gynecol. 2018 Jul;132(1):147-160. doi: 10.1097/AOG.0000000000002675. Erratum In: Obstet Gynecol. 2018 Dec;132(6):1507-1508.
- Beck D, Winzenborg I, Liu M, Degner J, Mostafa NM, Noertersheuser P, Shebley M. Population Pharmacokinetics of Elagolix in Combination with Low-Dose Estradiol/Norethindrone Acetate in Women with Uterine Fibroids. Clin Pharmacokinet. 2022 Apr;61(4):577-587. doi: 10.1007/s40262-021-01096-w. Epub 2021 Dec 8.
- Stodtmann S, Nader A, Polepally AR, Suleiman AA, Winzenborg I, Noertersheuser P, Ng J, Mostafa NM, Shebley M. Validation of a quantitative systems pharmacology model of calcium homeostasis using elagolix Phase 3 clinical trial data in women with endometriosis. Clin Transl Sci. 2021 Jul;14(4):1611-1619. doi: 10.1111/cts.13040. Epub 2021 May 7.
- Abbas Suleiman A, Nader A, Winzenborg I, Beck D, Polepally AR, Ng J, Noertersheuser P, Mostafa NM. Exposure-Safety Analyses Identify Predictors of Change in Bone Mineral Density and Support Elagolix Labeling for Endometriosis-Associated Pain. CPT Pharmacometrics Syst Pharmacol. 2020 Nov;9(11):639-648. doi: 10.1002/psp4.12560. Epub 2020 Oct 8.
- Winzenborg I, Polepally AR, Nader A, Mostafa NM, Noertersheuser P, Ng J. Effect of Elagolix Exposure on Clinical Efficacy End Points in Phase III Trials in Women With Endometriosis-Associated Pain: An Application of Markov Model. CPT Pharmacometrics Syst Pharmacol. 2020 Aug;9(8):466-475. doi: 10.1002/psp4.12545. Epub 2020 Jul 31.
- Surrey ES, Soliman AM, Agarwal SK, Snabes MC, Diamond MP. Impact of elagolix treatment on fatigue experienced by women with moderate to severe pain associated with endometriosis. Fertil Steril. 2019 Aug;112(2):298-304.e3. doi: 10.1016/j.fertnstert.2019.02.031. Epub 2019 Apr 13.
- Winzenborg I, Nader A, Polepally AR, Liu M, Degner J, Klein CE, Mostafa NM, Noertersheuser P, Ng J. Population Pharmacokinetics of Elagolix in Healthy Women and Women with Endometriosis. Clin Pharmacokinet. 2018 Oct;57(10):1295-1306. doi: 10.1007/s40262-018-0629-6.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- M12-667
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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