A Study to Learn More About How Well Elinzanetant Works and How Safe it is for the Treatment of Vasomotor Symptoms (Hot Flashes) That Are Caused by Hormonal Changes Over 26 Weeks in Women Who Have Been Through the Menopause (OASIS-2)

What this trial studies

Researchers are looking for a better way to treat women who have hot flashes after women have been through the menopause. Hot flashes are caused by the hormonal changes that happen when a woman's body has been through the menopause. Menopause is when women stop having a menstrual cycle, also called a period. During the menopause, the ovaries increasingly produce less sex hormones as a result of the natural ageing process and related hormonal adjustments.

Conditions in scope

• Vasomotor Symptoms Associated With Menopause
• Hot Flashes

Interventions

• Elinzanetant (BAY3427080) (Drug) — 120 mg elinzanetant orally once daily
• Placebo (Drug) — Matching placebo orally once daily

Who can join

Women only · Ages 40 Years to 65 Years

Inclusion criteria

• Postmenopausal, defined as:
• at least 12 months of spontaneous amenorrhea prior to signing of informed consent, or
• at least 6 months of spontaneous amenorrhea prior to signing of informed consent with serum follicle-stimulating hormone (FSH) levels \> 40 mIU/mL and a serum estradiol concentration of \< 30 pg/mL, or
• at least 6 months after hysterectomy at signing of informed consent with serum FSH levels \> 40 mIU/mL and a serum estradiol concentration of \< 30 pg/mL, or
• surgical bilateral oophorectomy with or without hysterectomy at least 6 weeks prior to signing of informed consent.
• Moderate to severe hot flash (HF) associated with the menopause and seeking treatment for this condition.
• Participant has completed Hot Flash Daily Diary (HFDD) for at least 11 days during the two weeks preceding baseline visit, and participant has recorded at least 50 moderate or severe HF (including night-time HF) over the last 7 days that the HFDD was completed (assessed at the Baseline Visit).

Exclusion criteria

• Any clinically significant prior or ongoing history of arrhythmias, heart block and QT prolongation either determined through clinical history or on ECG evaluation.
• Any active ongoing condition that could cause difficulty in interpreting vasomotor symptoms (VMS) such as: infection that could cause pyrexia, pheochromocytoma, carcinoid syndrome.
• Current or history (except complete remission for 5 years or more) of any malignancy (except basal and squamous cell skin tumors). Women receiving adjuvant endocrine therapy (e.g. tamoxifen, aromatase inhibitors, GnRH analogues) cannot be enrolled in this study.
• Uncontrolled or treatment-resistant hypertension. Women with mild hypertension can be included in the study if they are medically cleared prior to study participation.
• Untreated hyperthyroidism or hypothyroidism.
• Treated hyperthyroidism with no abnormal increase of thyroid function laboratory parameters and no relevant clinical signs for \> 6 months before signing of informed consent is acceptable.
• Treated hypothyroidism with normal thyroid function test results during screening and a stable (for ≥ 3 months before signing of informed consent) dose of replacement therapy is acceptable.
• Any unexplained post-menopausal uterine bleeding.

Eligibility wording paraphrased from the public record. View the full criteria on ClinicalTrials.gov before contacting a site.

Where it’s happening

Showing the first 10 of 113 sites. See all sites on ClinicalTrials.gov.

Status & timeline

• Overall status: Completed
• Study type: Interventional
• Phase: PHASE3
• Start date: 2021-10-29
• Primary completion: 2023-06-13
• Last update posted: 2026-02-12
• First posted: 2021-10-29

Sponsor & contact

Lead sponsor: Bayer (Industry)

For trial site contact information, use the official record at ClinicalTrials.gov. Contact details change frequently and the public record is the source of truth.

Outcome measures

Primary outcomes

• Mean Change in Frequency of Moderate to Severe HF From Baseline to Week 4 (Assessed by HFDD) (From baseline to Week 4)
  Participants' assessments of HF were recorded electronically twice daily using the sponsor developed Hot Flash Daily Diary (HFDD). The HFDD was completed in the morning after waking up (morning diary) and each evening at bedtime (evening diary) on the hand-held device. The HFDD items assessed the number of mild, moderate, and severe HF experienced during the day and during the…
• Mean Change in Frequency of Moderate to Severe HF From Baseline to Week 12 (Assessed by HFDD) (From baseline to Week 12)
  The frequency of moderate to severe HF for each week during the treatment period was calculated using the available data during that particular week. Specifically, for Week 12, Day 78-84 were used (Day 1 corresponds to start of treatment).
• Mean Change in Severity of Moderate to Severe HF From Baseline to Week 4 (Assessed by HFDD) (From baseline to Week 4)
  In the HFDD, hot flash (HF) severity is scored as 1=mild, 2=moderate, and 3=severe; a decrease indicates improvement. The diary records the number of mild, moderate, and severe HFs during day and night. Mild HFs are a "sensation of heat without sweating"; moderate are "heat with sweating but able to continue activity"; severe are "heat with sweating that stops activity."…
• Mean Change in Severity of Moderate to Severe HF From Baseline to Week 12 (Assessed by HFDD) (From baseline to Week 12)
  In the HFDD, hot flash (HF) severity is categorized as 1=mild, 2=moderate, 3=severe; thus, a decrease indicates improvement. The HFDD records the number of mild, moderate, and severe HFs during day and night. Mild HFs are a "sensation of heat without sweating"; moderate involve "heat with sweating but able to continue activity"; severe involve "heat with sweating that stops activity."…

Related ClearedRx care

If you’re reading this trial because you have menopause symptoms now, you don’t have to wait for a trial to access evidence-based care. ClearedRx prescribes the same FDA-approved and compounded HRT products that have been studied in trials like this one for decades.