A Trial on Fezolinetant for Vasomotor Symptoms in Men Receiving Androgen Deprivation Therapy (ADT)

April 28, 2026 updated by: NG Chi Fai, Chinese University of Hong Kong

A Phase II Trial on Fezolinetant for Vasomotor Symptoms in Men Receiving Androgen Deprivation Therapy (ADT) for Prostate Cancer (Fez-Cap)

This is a randomized, double-blind, placebo-controlled, parallel-group, multicenter clinical study to investigates the efficacy of fezolinetant in men undergoing ADT for prostate cancer in alleviating Vasomotor syndromes.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Participants will be randomized in a 1:1 manner to receive fezolinetant 45 mg or placebo orally once daily for 12 weeks in total, with the primary and secondary outcomes being assessed at week 4, 8 and 12 with standardized questionnaires, symptom diaries, blood taking, and clinical history taking in the clinic setting.

Study Type

Interventional

Enrollment (Estimated)

54

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • Hong Kong
      • Shatin, Hong Kong
        • Prince of Wales Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Patients aged at least 18 years old on the index date
  2. Histologically confirmed prostatic adenocarcinoma with localised or metastatic disease
  3. Karnofsky index score of 70% or more
  4. Started on androgen deprivation therapy (both medical or surgical), for at least 3 months at baseline
  5. Baseline daily hot flush score ≥4

Exclusion Criteria:

  1. Patients treated with drugs related to the study medications or with potential effect for vasomotor symptoms, including selective serotonin-re-uptake inhibitors, steroid hormones, clonidine, gabapentin, veralipride, or β-alanine
  2. Concomitant use of CYP1A2 inhibitors, e.g. fluoroquinolone, fluovoxamine, cimetidine, propranolol, verapamil, acyclovir, allopurinol, theophylline, etc.

  3. Active liver disease including:

    - cirrhosis - liver failure - jaundice - elevated total or direct bilirubin - abnormal ALT / AST - abnormal INR

  4. Severe (eGFR 15 to less than 30 mL/min/1.73 m2) renal impairment or end-stage renal disease (eGFR less than 15 mL/min/1.73 m2)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Treatment Arm
Fezolinetant 45 mg orally once daily for 12 weeks.
Drug: Fezolinetant
Fezolinetant 45 mg orally once daily for 12 weeks.
Placebo Comparator: Placebo Arm
Placebo orally once daily for 12 weeks.
Drug: Placebo
Placebo orally once daily for 12 weeks.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Hot flush severity
Time Frame: Baseline, week 3, week 7 and week 11
Participants will document daily VMS episodes categorised as mild, moderate, severe, or very severe.
Baseline, week 3, week 7 and week 11
Daily hot flush score
Time Frame: Baseline, week 3, week 7 and week 11
Calculatedusing the formula: (1 × mild) + (2 × moderate) + (3 × severe) + (4 × very severe) divided by the number of diary days completed in that week.
Baseline, week 3, week 7 and week 11

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Patient reported quality of life by QLQ-C30
Time Frame: Baseline, week 4, week 8 and week 12
Quality of life measured by QLQ-C30, score 0-100, the higher the score the better in quality of life
Baseline, week 4, week 8 and week 12
Sleep Quality
Time Frame: Baseline, week 4, week 8 and week 12
By Pittsburgh Sleep Quality Index (PSQI). PSQI is scored by summing seven component scores (0-3 each) to produce a global score ranging from 0 to 21. A total score greater than 5 indicates poor sleep quality.
Baseline, week 4, week 8 and week 12
Mood status
Time Frame: Baseline, week 4, week 8 and week 12
By Patient Health Questionnaire-9 (PHQ-9). The PHQ-9 is a 9-item screening tool used to measure depression severity, with a total score ranging from 0 to 27. Scores are interpreted as: 0-4 (none-minimal), 5-9 (mild), 10-14 (moderate), 15-19 (moderately severe), and 20-27 (severe).
Baseline, week 4, week 8 and week 12
Lower urinary tract symptoms (LUTS)
Time Frame: Baseline, week 4, week 8 and week 12
Urinary symptoms measured by IPSS score, score ranging from 0-35 (the higher the worse)
Baseline, week 4, week 8 and week 12
Patient reported quality of life by Hot Flash-Related Daily Interference Scale (HFRDIS)
Time Frame: Baseline, week 4, week 8 and week 12
HFRDIS) is a 10-item, self-report tool measuring how vasomotor symptoms (hot flashes) impact daily life over the past week. Scores are summed across 10 items on a 0-10 scale (total 0-100), with higher scores indicating greater interference. Validated cut-points for severity are mild (0-3.9), moderate (4-6.9), and severe (7-10)
Baseline, week 4, week 8 and week 12
Adverse Events
Time Frame: Baseline, Week 4, Week 8 and Week 12
CTCAE rectal toxicity, Grade 1-5 for any rectal toxicity, the higher the score the more severe the toxicity
Baseline, Week 4, Week 8 and Week 12

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Chinese University of Hong Kong

Investigators

  • Principal Investigator: Chi Fai NG, MD, Chinese University of Hong Kong

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

July 1, 2026

Primary Completion (Estimated)

December 31, 2027

Study Completion (Estimated)

March 31, 2028

Study Registration Dates

First Submitted

April 21, 2026

First Submitted That Met QC Criteria

April 28, 2026

First Posted (Actual)

May 5, 2026

Study Record Updates

Last Update Posted (Actual)

May 5, 2026

Last Update Submitted That Met QC Criteria

April 28, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CRE-2025.427-T

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Vasomotor Symptoms

Clinical Trials on Placebo

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Mexico

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe