NCT06439524 · Main Line Health
The Effect of Medical Management Following Excisional Surgery for Endometriosis: A Randomized Controlled Trial
What this study is about
The goal of this investigator-initiated single-site clinical trial is to compare the overall quality of life of participants taking Relugolix two or more treatments used together (Rel-CT) following excisional surgery for endometriosis to participants that do not take Rel-CT following the same surgery. Rel-CT is an FDA approved form of medical treatment for endometriosis.
View original scientific description
The goal of this investigator-initiated single-site clinical trial is to compare the overall quality of life of participants taking Relugolix combination therapy (Rel-CT) following excisional surgery for endometriosis to participants that do not take Rel-CT following the same surgery. Rel-CT is an FDA approved form of medical treatment for endometriosis. It is known to work in treating endometriosis pain. However, investigators do not know whether or not there is a benefit to beginning Rel-CT immediately following surgery. This study will test if patients who take Rel-CT after surgery have better quality of life and less chance the endometriosis comes back, requiring additional surgery. The main question it aims to answer is: \- Does taking Rel-CT following excisional surgery for endometriosis result in higher Endometriosis Health Profile 30 (EHP-30) scores, indicating a positive impact on overall health-related quality of life and well-being? Participants will: * Be randomly assigned to one of two treatment groups. One treatment group will take study drug Rel-CT after having excisional surgery, and the other treatment group will just have the surgery alone. * Be asked to complete questionnaires, called the Endometriosis Health Profile 30 (EHP-30) at 4 timepoints. The first time is before surgery, then at follow-up visits at 1 month, 3 months, and 6 months. The survey has 30 questions that ask about pain, control, powerlessness, emotional well-being, social support, and self-image. Researchers will compare the two treatment groups (Rel-CT and non Rel-CT) to see if there is a change in EHP-30 scores.
Interventions
DRUG
40 mg relugolix, 1 mg estradiol, 0.5 mg norethindrone acetate
if randomized to study drug, participants will take one tablet Rel-CT daily following excisional surgery for endometriosis
Primary outcome measures
This study aims to determine if immediate postoperative medical suppression with Regugolix combination therapy (Rel-CT) following excisional surgery for endometriosis is superior to surgery alone.
Time frame: 6 months
The study will assess quality of life via change in total Endometriosis Health Profile 30 (EHP-30) scores following excisional surgery for endometriosis from baseline to 6 months postoperatively.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Age ≥ 18 years
- Planning to undergo an elective laparoscopic or robotic procedure for known or suspected endometriosis
Exclusion criteria
- -A known contraindication to REL-CT. Contraindications include:
- High risk of arterial, venous thrombotic, or thromboembolic disorder
- Pregnancy Known osteoporosis
- Current or history of breast cancer or other hormone-sensitive malignancies
- Known hepatic impairment or disease
- Undiagnosed abnormal uterine bleeding
- Known hypersensitivity to components of Rel-CT
- The patient did not discontinue hormonal suppression within the required timeline: Trans-Dermal, Oral Medication, Patch, or Vaginal Ring: day before surgery Intrauterine Device or Sub-Dermal Implant: removed at surgery Injectable Medication: at least 12 weeks before surgery
- Primary language other than English/Spanish
- Interested in pregnancy within the 6 months following the surgical procedure.
- If pregnancy test performed during pre-surgical work up is positive, the patient will no longer be a candidate for endometriosis surgery and will therefore not be eligible for the study.
- Patients without histologic evidence of endometriosis following their surgical procedure will be removed from the study prior to receiving the study intervention.
- Patients who undergo a surgical intervention more invasive than the planned laparoscopic or robotic excisional surgery, such as open abdominal surgical repair, will be removed from the study prior to receiving the study intervention.
Where
- Wynnewood, Pennsylvania
Collaborators
Pfizer, Sumitomo Pharma Switzerland GmbH
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Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 12, 2026 · Source of record for eligibility and locations