Comparing the effects of two medications for endometriosis

Far Eastern Memorial Hospital

Phase 3 Interventional Far Eastern Memorial Hospital · NCT05697471

This study is testing which medication, dienogest or danazol, works better for women over 20 with endometriosis to help relieve their symptoms.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment120 (estimated)
Ages20 Years and up
SexFemale
SponsorFar Eastern Memorial Hospital Academic / other
Locations1 site (Banqiao, New Taipei)
Trial IDNCT05697471 on ClinicalTrials.gov

What this trial studies

This study aims to evaluate the efficacy of two treatments, dienogest and danazol, for women suffering from endometriosis-related conditions such as adenomyosis. Women over 20 years old with diagnosed endometriosis will be randomly assigned to receive either dienogest or danazol. The study will assess symptom severity and perform examinations at baseline, 4 weeks, and 16 weeks after treatment to determine which medication is more effective.

Who should consider this trial

Good fit: Ideal candidates are women over 20 years old diagnosed with endometriosis or related conditions.

Not a fit: Patients with a history of breast cancer or other cancers, or those with vascular obstruction, may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide clearer guidance on the most effective medication for treating endometriosis, improving patient outcomes.

How similar studies have performed: While there have been studies on the individual effects of dienogest and danazol, this direct comparison in a randomized setting is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* \> 20 years old
* Have an endometriosis-related condition (including adenomyosis, adenomyoma, ovarian endometrioma, or pelvic endometriosis).

Exclusion Criteria:

* Minors.
* Have a history of breast cancer or other cancers.
* Patients with vascular obstruction such as stroke.

Where this trial is running

Banqiao, New Taipei

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Endometriosis
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.