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A long-term extension study of TAK-385 in the treatment of endometriosis

A Phase II, multicenter, long-term extension study to compare the safety and efficacy of TAK-385 (10, 20, and 40 mg) following oral administration for 12 weeks or more in the treatment of endometriosis

Status
Unknown
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2080221549
Enrollment
397
Registered
2011-08-29
Start date
2011-08-29
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Endometriosis

Interventions

Sponsors

TAKEDA PHARMACEUTICAL COMPANY LTD.
Lead Sponsor

Eligibility

Sex/Gender
Female

Inclusion criteria

Inclusion criteria: Participants who have completed TAK-385/CCT-101 study

Exclusion criteria

Exclusion criteria: 1. Participants who had an adverse event in TAK-385/CCT-101 study which makes continued administration of the study drug diffficult 2. Participants who became unable to comply with the protocol due to onset of a new disease, symptom, finding, or aggravation of clinical laboratory findings 3. Participants in whom investigator deems that the study drug shows no efficacy based on the level of pain, menstruation status, and the status of analgesic drug intake in TAK-385/CCT-101 study, or that study continuation represents an unacceptable risk 4. Participants in whom investigator deems that study continuation is difficult due to the occurrence of low estrogen symptoms in TAK-385/CCT-101 study which were attributed to the pharmacological effects of the study drug, taking into account the level and frequency of the adverse events etc. as well as the risk-benefit of subjects

Design outcomes

Primary

MeasureTime frame
Bone mineral density, adverse events, vital signs, body weight, 12-lead ECG, clinical laboratory tests Bone mineral density will be measured by a dual-energy X-ray absorptiometry (DEXA) scan. Other parameters will be assessed based on the results of clinical laboratory tests, etc. Timeframe:During treatment period and follow-up period

Secondary

MeasureTime frame
The Visual Analogue Scale (VAS) score for pelvic pain and VAS score for dyspareunia Pelvic pain and dyspareunia will be assessed using the VAS as pain evaluation scale. Timeframe:Treatment period

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026