Skip to main content
TTrialFinderData
TrialFinderData is for informational purposes only and does not provide medical advice. Always talk to your doctor.

Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 2INTERVENTIONAL

A Study to Evaluate Preventive Treatments for GPRC5D-related Oral Events

A Phase 2, Open-label, Randomized Study to Evaluate GPRC5D-related Oral Events

A Study to Evaluate Preventive Treatments for GPRC5D-related Oral Events (NCT06500884) is a Phase 2 interventional studying Multiple Myeloma, sponsored by Janssen Research & Development, LLC. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

The purpose of this study is to identify preventive treatments that can minimize the occurrence, severity, and duration of talquetamab-related taste changes (dysgeusia), during the prophylaxis (preventive) treatment phase, to better characterize the signs or symptoms of talquetamab-related taste changes and to better characterize the signs or symptoms of ramantamig-related taste changes.

What Stage of Research Is This?

Phase 2 trials evaluate whether a treatment actually works against Multiple Myeloma and continue monitoring side effects. Phase 2 enrolls larger groups (typically 100–300 patients) and produces the first real efficacy signal. A successful Phase 2 readout is what unlocks the much larger Phase 3 confirmatory trials needed for FDA approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 210 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Multiple Myeloma subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Who May Qualify: - Multiple myeloma (MM) according to IMWG diagnostic criteria - Were triple-class exposed (received prior treatment with a PI, an IMiD, and anti CD38 mAb) - Documented evidence of progressive disease based on investigator's determination of response by IMWG criteria on or after their last regimen - Have an Eastern Cooperative Oncology Group-performance status (ECOG-PS) of 0 or 1 at screening. Participants with ECOG-PS 2 or 3 are eligible for the study if the ECOG-PS score is related to stable physical limitations (e.g., wheelchair-bound due to prior spinal cord injury) and not related to multiple myeloma or associated therapy - Be willing and able to adhere to the lifestyle restrictions specified in the protocol Who Should NOT Join This Trial: - Contraindications or life-threatening known allergies, hypersensitivity, or intolerance to any study drug or its excipients - Stroke, transient ischemic attack, or seizure within 6 months prior to screening - Any of the following within 6 months prior to the first dose of study treatment: severe or unstable angina, myocardial infarction; major thromboembolytic event (e.g., pulmonary embolism, cerebrovascular accident), clinically significant ventricular arrythmia or heart failure New York Heart Association functional classification Class III or IV. Uncomplicated deep vein thrombosis is not considered exclusionary - Major surgery or had significant traumatic injury within 2 weeks prior to the start of administration of study treatment, or will not have fully recovered from surgery, or has major surgery planned during the time the participant is expected to be treated in the study or within 2 weeks after administration of the last dose of study treatment ...See full criteria on ClinicalTrials.gov Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
Inclusion Criteria: * Multiple myeloma (MM) according to IMWG diagnostic criteria * Were triple-class exposed (received prior treatment with a PI, an IMiD, and anti CD38 mAb) * Documented evidence of progressive disease based on investigator's determination of response by IMWG criteria on or after their last regimen * Have an Eastern Cooperative Oncology Group-performance status (ECOG-PS) of 0 or 1 at screening. Participants with ECOG-PS 2 or 3 are eligible for the study if the ECOG-PS score is related to stable physical limitations (e.g., wheelchair-bound due to prior spinal cord injury) and not related to multiple myeloma or associated therapy * Be willing and able to adhere to the lifestyle restrictions specified in the protocol Exclusion Criteria: * Contraindications or life-threatening known allergies, hypersensitivity, or intolerance to any study drug or its excipients * Stroke, transient ischemic attack, or seizure within 6 months prior to screening * Any of the following within 6 months prior to the first dose of study treatment: severe or unstable angina, myocardial infarction; major thromboembolytic event (e.g., pulmonary embolism, cerebrovascular accident), clinically significant ventricular arrythmia or heart failure New York Heart Association functional classification Class III or IV. Uncomplicated deep vein thrombosis is not considered exclusionary * Major surgery or had significant traumatic injury within 2 weeks prior to the start of administration of study treatment, or will not have fully recovered from surgery, or has major surgery planned during the time the participant is expected to be treated in the study or within 2 weeks after administration of the last dose of study treatment * A WETT score indicating severe dysgeusia at screening and confirmed prior to randomization. Also unresolved/severe dysgeusia referred by the participant or a finding in the physical examination/oral cavity inspection. Some examples include leukoplakia, prior mouth cancers, extensive dental caries, severe periodontitis, active oral infections, candidiasis, parotic gland removal, or radiotherapy with resultant xerostomia

Treatments Being Tested

DRUG

Talquetamab

Talquetamab will be administered subcutaneously.

DRUG

Prophylaxis A

Prophylaxis A will be administered orally.

DRUG

Prophylaxis B

Prophylaxis B will be administered orally.

DRUG

Prophylaxis C

Prophylaxis C will be administered orally.

DRUG

Prophylaxis D

Prophylaxis D will be administered topically.

DRUG

Ramantamig

Ramantamig will be administered subcutaneously.

Locations (20)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

University of California San Francisco
San Francisco, California, United States
Colorado Blood Cancer Institute
Denver, Colorado, United States
Yale University School Of Medicine
New Haven, Connecticut, United States
Icahn School of Medicine at Mt. Sinai
New York, New York, United States
University of Rochester Medical Center
Rochester, New York, United States
Duke University Medical Center
Durham, North Carolina, United States
University Hospitals Cleveland Medical Center
Cleveland, Ohio, United States
Virginia Commonwealth University - Massey Cancer Center
Richmond, Virginia, United States
University of Washington
Seattle, Washington, United States
Hospitais Integrados da Gavea SA DF Star
Brasília, Brazil
Fundacao Universidade de Caxias do Sul
Caxias do Sul, Brazil
Hospital Erasto Gaertner- Liga Paranaense de Combate ao Cancer
Curitiba, Brazil
Instituto D Or de Pesquisa e Ensino
Salvador, Brazil
Clinica Medica Sao Germano S/S LTDA
São Paulo, Brazil
Instituto D Or de Pesquisa e Ensino IDOR
São Paulo, Brazil
VUMC Amsterdam
Amsterdam, Netherlands
Albert Schweitzer Ziekenhuis
Dordrecht, Netherlands
Erasmus MC
Rotterdam, Netherlands
Hospital Espanol Auxilio Mutuo Auxilio Mutuo Cancer Center
San Juan, Puerto Rico
Seoul National University Hospital
Seoul, South Korea

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT06500884), the sponsor (Janssen Research & Development, LLC), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT06500884 clinical trial studying?

The purpose of this study is to identify preventive treatments that can minimize the occurrence, severity, and duration of talquetamab-related taste changes (dysgeusia), during the prophylaxis (preventive) treatment phase, to better characterize the signs or symptoms of talquetamab-related taste changes and to better characterize the signs or symptoms of ramantamig-related taste changes. The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT06500884?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT06500884?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT06500884. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT06500884. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.