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Relugolix for Endometriosis Pain: What a 2025 Meta-Analysis Says About Relief, Quality of Life, and Side Effects

What the latest evidence says about pain relief, quality of life (EHP-30), side effects, add-back therapy, and how relugolix compares to leuprorelin.

By Dr Steven Vasilev
A Black woman in a modern home office reviews a laptop showing a clean forest plot comparing relugolix and leuprorelin with an EHP-30 chart, a note about add-back therapy, and a pill organizer on the desk.

Living with endometriosis can mean dealing with persistent pelvic pain, painful periods, and the emotional toll of symptoms that affect work, relationships, and daily routines. Newer oral medications—like relugolix—are being studied and used to help reduce endometriosis-associated pain and improve quality of life.


This post summarizes patient-relevant findings from a 2025 systematic review and meta-analysis of randomized controlled trials (RCTs)published in Frontiers in Endocrinology that evaluated relugolix using the Endometriosis Health Profile-30 (EHP-30), a common endometriosis quality-of-life questionnaire.


What is endometriosis—and why can it hurt so much?


Endometriosis is often described as a chronic condition where tissue similar to the lining of the uterus is found outside the uterus. Many people experience pain that can be intense and life-disrupting. This meta-analysis focused on endometriosis-associated pain and how treatment affected pain and quality of life as captured by EHP-30 scores.


How does relugolix work?


Relugolix is an oral gonadotropin-releasing hormone (GnRH) receptor antagonist. In plain language: it works by reducing hormonal signals that contribute to endometriosis-related pain.


The review also discusses a key practical difference from some older GnRH-based treatments (like GnRH agonists such as leuprorelin): relugolix may provide comparable benefit without an initial “flare-up” of symptoms that can happen when starting a GnRH agonist. (The paper emphasizes non-inferiority vs leuprorelin and notes the lack of a flare-up as a potential advantage.)


Does relugolix reduce endometriosis pain? What the evidence shows


Across the included RCTs, relugolix was associated with meaningful improvements in EHP-30 pain-related outcomes—especially compared with placebo (no active treatment).


Key findings (vs placebo):

  • Improved EHP-30 Pain domain scores: mean difference (MD) 6.77(95% CI 3.15 to 10.39, p=0.0002)
  • Higher likelihood of being a “responder” on the EHP-30 Pain domain: odds ratio (OR) 3.245(95% CI 2.496 to 4.219, p < 0.0001)


What this means for patients: in these studies, people taking relugolix were more likely to report meaningful pain improvement than those taking placebo.


Beyond pain: quality-of-life improvements (EHP-30 domains)


Endometriosis isn’t only about pain levels—it can affect mood, relationships, and self-confidence. In this meta-analysis, relugolix also improved several quality-of-life areas compared with placebo:

  • Emotional well-being: MD 5.71(95% CI 1.87 to 9.55, p=0.0036)
  • Social support: MD 6.40(95% CI 0.88 to 11.93, p=0.0231)
  • Self-image: MD 6.00(95% CI 1.03 to 10.96, p=0.0179)


If you’ve felt that endometriosis affects your mental health or sense of self, these findings are important: the research suggests relugolix may help improve how you feel and function, not just pain scores.


How does relugolix compare with leuprorelin (an older GnRH treatment)?


Some trials compared relugolix with leuprorelin (a GnRH agonist). The review concludes that:

  • Relugolix is generally non-inferior (meaning “not worse”) compared with leuprorelin.
  • It was not statistically superior (not clearly better) for overall efficacy or quality-of-life impact.
  • In results summarized by the authors, relugolix showed a numerically smaller improvement than leuprorelin in at least one analysis (reported as MD -3.79, 95% CI -6.27 to -1.31), and the discussion notes the confidence intervals did not show clear superiority.


Patient takeaway: Relugolix may be an alternative option with similar overall benefit, and it may avoid the initial symptom flare associated with starting a GnRH agonist—an issue some patients find difficult.


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Side effects and “add-back” therapy: what to know


Like many treatments that reduce estrogen activity, relugolix can cause hypoestrogenic side effects (symptoms related to lower estrogen).


The meta-analysis reports common adverse events such as:

  • Hot flushes(noted as frequent and dose-dependent)
  • Headache
  • Fatigue
  • Musculoskeletal pain
  • Nasopharyngitis


The paper also highlights the role of combination (“add-back”) therapy—relugolix used with estradiol and norethisterone acetate—which is designed to help mitigate hypoestrogenic side effects while maintaining benefit.


Important note: The article indicates that add-back therapy helps with tolerability and management of hypoestrogenic effects, but the blog data provided here does not include specific numerical results for every side-effect rate or discontinuation rate by regimen—so we can’t quantify exactly how much add-back reduces each side effect from this summary alone.


Relugolix combination therapy vs relugolix alone: is one better?


In subgroup analyses:

  • Combination therapy showed a numerically larger improvement (MD 8.86) than
  • Monotherapy (MD 4.99)

However, the authors report the difference between subgroups was not statistically significant. In other words, combination therapy may look better in numbers, but this meta-analysis could not confirm it is definitively better for pain outcomes based on the available trial data.


Is relugolix effective long term?


This is one of the biggest unanswered questions. The review notes that:

  • Benefits were most clearly demonstrated around 24 weeks
  • For longer follow-up periods (including 52 and 104 weeks), the confidence intervals crossed zero, meaning the meta-analysis could not conclusively demonstrate continued significant benefit at those extended durations


What this means for you: If you and your clinician are considering relugolix beyond 6 months, it’s reasonable to ask about:

  • symptom monitoring plans,
  • side effect management (including add-back therapy),
  • and what is known (and not known) about longer-term outcomes.


Actionable takeaways: questions to bring to your next appointment


If you’re considering relugolix for endometriosis-associated pain, these discussion points can help:


1. Am I a good candidate for an oral GnRH antagonist?

Ask how relugolix fits with your symptoms, prior treatments, and preferences.


2. Should I use relugolix alone or relugolix combination (add-back) therapy?

This review suggests add-back is important for managing hypoestrogenic effects; the pain benefit difference vs monotherapy wasn’t statistically definitive.


3. What side effects should I watch for, and how will we manage them?

Hot flushes, headache, fatigue, and muscle aches were commonly reported; hot flushes were dose-dependent.


4. What’s the plan for follow-up at 24 weeks—and beyond?

Long-term benefit past 24 weeks was not clearly established in this meta-analysis, so having a reassessment timeline matters.


Cautions and gaps: avoiding common misunderstandings


Based on the authors’ discussion, it’s worth keeping these points in mind:

  • Don’t assume long-term benefit is guaranteed. Evidence beyond ~24 weeks is limited/inconclusive in this analysis.
  • Don’t assume relugolix is “better than” leuprorelin. It appears comparable overall (non-inferior), but not clearly superior.
  • Don’t minimize side effects. Many are tied to lower estrogen, and the paper highlights the importance of add-back therapy for tolerability.
  • Results can vary between people and studies. The meta-analysis reported substantial heterogeneity (I² reported as 90.7%), suggesting responses may differ depending on regimen, comparator, and other study factors.

References

  1. Xie J, Ni X, Huang Q, Guo Y. Relugolix’s impact on endometriosis-associated pain and quality of life: a meta-analysis of EHP-30 outcomes. Frontiers in Endocrinology. 2025. (Systematic review and meta-analysis of RCTs; PRISMA-guided.) DOI: 10.3389/fendo.2025.1650579

Quick Answers

Can I keep working with endometriosis?

Yes—many people with endometriosis keep working, but it often requires a realistic plan around symptoms like pain, fatigue, brain fog, heavy bleeding, and unpredictable flares. Work becomes harder when endometriosis pain isn’t just “period pain,” but a complex, whole‑nervous‑system experience that can persist throughout the month and sometimes continues even after partial treatments. If your job performance is being affected, that’s not a personal failure—it’s a sign your symptoms need more targeted evaluation and a clearer strategy.


In our practice, we think about work in two parallel tracks: managing symptoms so you can function day to day, and treating the underlying disease when it’s driving ongoing inflammation, adhesions, or organ involvement. Depending on your situation, this may include a structured pain management approach (often multimodal) and, when appropriate, excision surgery planning based on a careful review of your history, imaging, and prior operative/pathology reports. If you’re wondering what’s realistic for you—whether that’s staying at work with accommodations, reducing hours temporarily, or planning time off for treatment—reach out to schedule a consultation so our team can review your records and help you map out next steps.

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How do I explain endometriosis to my employer?

It often helps to keep your explanation simple and work-focused: endometriosis is a chronic inflammatory condition where tissue similar to the uterine lining grows outside the uterus and can cause significant pelvic pain, fatigue, and GI or bladder symptoms. Symptoms can flare unpredictably and aren’t always limited to your period, which is why you may need flexibility at certain times. You don’t need to share intimate details—just the functional impact (for example: pain, fatigue, and medical appointments can affect attendance, sitting/standing tolerance, or concentration).


If you’re requesting support, be specific about what would help you do your job well, such as intermittent time off for flares, the ability to work from home when symptoms spike, scheduled breaks, or flexibility around medical visits and potential procedures. Many patients find it useful to frame this as a long-term health condition with variable days rather than a one-time illness, and to document patterns of symptoms and missed work so your needs are clear.


If you’d like, our team can help you describe your condition and anticipated care in a medically accurate way that supports workplace accommodations, especially if symptoms are affecting your ability to function consistently. You can also explore our educational resources on endometriosis and work impacts, and reach out to schedule a consultation if you’re looking for a clearer plan for diagnosis and treatment.

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How long does pelvic floor therapy take to help endometriosis?

Most patients don’t feel a dramatic change after one visit—pelvic floor therapy for endometriosis tends to build over time. When symptoms are being driven by pelvic floor overactivity, protective muscle guarding, and nerve sensitization, early sessions often focus on assessment, calming pain signaling, and learning strategies your body can tolerate. Many people notice the first meaningful shifts over several weeks as muscles start to relax and coordination improves, especially for pain with sex, bladder/bowel symptoms, and daily pelvic tension.


How long it takes overall depends on what’s keeping your pain “switched on”—active disease, adhesions, central sensitization, posture/movement compensations, or a mix. If endometriosis lesions are still a major pain generator, therapy can still help reduce pelvic floor spasm and improve function, but it may work best as part of a broader plan that also addresses the disease itself. In our practice, we often use pelvic floor therapy as a complement before and/or after excision (when indicated) to support recovery, improve comfort with exams or intimacy, and reduce the odds that muscle and nerve patterns keep pain going. If you’d like, our team can help you figure out whether pelvic floor dysfunction is a key driver of your symptoms and what a realistic therapy timeline could look like for you.

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Can endometriosis cause inflammation-related weight gain?

Yes—there can be a connection, but it’s usually not as simple as “inflammation makes you gain fat.” Endometriosis is an inflammatory condition, and that inflammation can drive fluid shifts, pelvic and abdominal swelling, bowel slowing/constipation, and the classic waxing-and-waning “endo belly,” all of which can look and feel like weight gain even when body fat hasn’t changed. Pain, fatigue, and stress can also reduce activity or change appetite patterns, which can indirectly affect body composition over time.


What’s also emerging in research is a possible link between endometriosis and certain metabolic risk patterns in some people (like central waist changes and lipid markers). That doesn’t prove endometriosis directly causes metabolic changes—or that metabolic changes cause endometriosis—but it does support why some patients feel their body is harder to “regulate” while the disease is active. If weight changes, bloating, or a new shift in your waistline is part of your story, our team can help you sort out what’s most likely inflammation and GI distension versus longer-term metabolic or hormonal contributors, and build a plan that aligns with your symptoms and goals. If you’d like, you can reach out to schedule a consultation so we can evaluate the full picture and discuss treatment options, including excision and coordinated whole-person care.

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What are alternatives to ibuprofen for endometriosis pain?

If ibuprofen isn’t working for you—or you can’t take it—there are still several evidence-based ways we can approach endometriosis pain, depending on what’s driving it. Some pain is more inflammatory and cramp-like, while other pain behaves more like nerve pain (burning, electric, radiating) or becomes amplified over time through central sensitization. That’s why the “best” alternative isn’t one universal medication, but a plan matched to your pain pattern and goals (including fertility).


On the medication side, alternatives may include other NSAIDs, acetaminophen, and—when symptoms fit—neuropathic pain modulators (commonly medications used for nerve pain) that help calm overactive pain signaling. Some patients also ask about low-dose naltrexone; it’s a promising option for certain centralized pain conditions, but it isn’t proven as an endometriosis-specific treatment, so we treat it as an adjunct with careful expectations. Non-medication options can be genuinely useful too, especially when layered together—things like home electrical stimulation (TENS) for flares, and pain-focused psychological strategies that reduce the pain–stress amplification loop.


Most importantly, alternatives to ibuprofen are about managing symptoms while we keep sight of the underlying disease: symptom control alone can feel like a band-aid if active lesions are still driving inflammation, scarring, and organ irritation. Our team can help you sort out what type(s) of pain you’re experiencing and build a multimodal plan that fits your body and your timeline—whether you’re pursuing definitive diagnosis, considering excision surgery, or trying to stabilize day-to-day function in the meantime. If you’d like, reach out to schedule a consultation so we can personalize options rather than relying on trial-and-error.

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Have a question?

Dr. Steven Vasilev delivers best-in-class endometriosis guidance and a personalized treatment plan—built on evidence and your unique biology.


Led by Steven Vasilev, MD—an internationally recognized endometriosis specialist & MIGS surgeon—Lotus Endometriosis Institute is virtual-forward, with many patients traveling nationally for care. Clinical evaluation and surgical treatment are provided in California.

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