Using a Steroid Mouthwash to Prevent Mouth Sores During Chemotherapy
SMILE
Study for Dexamethasone Mouthwash in Lowering Episodes of Oral Mucositis Among Patients With Cancer: The SMILE Study
1 other identifier
interventional
45
1 country
1
Brief Summary
The goal of this clinical trial is to learn if a steroid mouthwash (dexamethasone) can prevent mouth sores caused by chemotherapy in adults with cancer. The main questions it aims to answer are: Does using dexamethasone mouthwash before and during chemotherapy lower the chance of getting moderate to severe mouth sores? Can this approach reduce pain and improve comfort during chemotherapy? Researchers will compare patients using the mouthwash to a historical group of patients who received similar chemotherapy but did not use the mouthwash, to see if the mouthwash helps prevent mouth sores. Participants will: Use a steroid mouthwash (4 times daily) for up to 8 weeks during chemotherapy Complete a short weekly survey about mouth discomfort during infusion visits
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for phase_4
Started Apr 2026
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
December 1, 2025
CompletedFirst Posted
Study publicly available on registry
December 17, 2025
CompletedStudy Start
First participant enrolled
April 1, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
July 1, 2027
ExpectedStudy Completion
Last participant's last visit for all outcomes
January 1, 2028
March 30, 2026
March 1, 2026
1.2 years
December 1, 2025
March 26, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Incidence of Grade ≥2 Oral Mucositis
Proportion of participants who develop grade 2 or higher oral mucositis, as assessed by Common Terminology Criteria for Adverse Events (CTCAE v5.0), during chemotherapy treatment while using dexamethasone mouthwash.
From start of chemotherapy through completion of first chemotherapy cycle (up to 8 weeks)
Secondary Outcomes (5)
Severity of Oral Mucositis Symptoms (Clinician Assessed)
From start of chemotherapy through completion of first chemotherapy cycle (up to 8 weeks)
Severity of Oral Mucositis Symptoms (Patient-Reported)
From start of chemotherapy through completion of chemotherapy cycle 1 (up to 8 weeks)
Chemotherapy Treatment Modifications Due to Oral Mucositis
Up to 16 weeks
Number of Participants With Adverse Events Related to Dexamethasone Mouthwash
Up to 16 weeks
Mouthwash Adherence
Daily for the first 8 weeks of chemotherapy
Study Arms (1)
Dexamethasone Mouthwash Intervention Group
EXPERIMENTALParticipants in this arm will receive an alcohol-free dexamethasone mouthwash (0.5 mg per 5 mL solution). They will be instructed to swish and spit 10 mL of the mouthwash for 2 minutes, four times daily, beginning in the first week of chemotherapy. Mouthwash use will continue for at least 8 weeks.
Interventions
Participants will use 10 mL of alcohol-free dexamethasone mouthwash (0.5 mg per 5 mL) as a swish-and-spit rinse for 2 minutes, four times per day. Use will begin during the first week of chemotherapy and continue for at least 8 weeks.
Eligibility Criteria
You may qualify if:
- ≥18 years old
- Confirmed cancer diagnosis
- Scheduled to receive or receiving chemotherapy known to be associated with oral mucositis (e.g., anthracyclines and taxanes)
- Ability to provide informed consent
- Ability to comply with study procedures
You may not qualify if:
- Current tobacco usage or usage within the past 6 weeks.
- HIV/AIDS
- Gastrointestinal disorder (such as Crohn's disease, ulcerative colitis, or celiac disease)
- History of cold sores (herpes simplex virus)
- Herpes zoster (oral shingles) within the past 6 weeks
- Active oral infections at the time of enrollment (e.g., candidiasis)
- Known sensitivity or allergy to dexamethasone
- Inability to self-administer or tolerate mouthwash protocol
- Concurrent enrollment in conflicting clinical trials
- Existing oral ulcers or oral mucositis at enrollment
- Pregnant
- Uncontrolled diabetes mellitus as defined by HbA1c unknown or \>8% in the past 3 months despite adequate therapy
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Woman'slead
Study Sites (1)
Woman's Hospital
Baton Rouge, Louisiana, 70817, United States
Related Publications (6)
Saigal B, Guerra L. Prevention of Stomatitis: Using Dexamethasone-Based Mouthwash to Inhibit Everolimus-Related Stomatitis. Clin J Oncol Nurs. 2018 Apr 1;22(2):211-217. doi: 10.1188/18.CJON.211-217.
PMID: 29547614BACKGROUNDSeiler S,Kosse J,Loibl S,Jackisch C
BACKGROUNDKuderer NM, Desai A, Lustberg MB, Lyman GH. Mitigating acute chemotherapy-associated adverse events in patients with cancer. Nat Rev Clin Oncol. 2022 Nov;19(11):681-697. doi: 10.1038/s41571-022-00685-3. Epub 2022 Oct 11.
PMID: 36221000BACKGROUNDRuddy KJ, Zahrieh D, He J, Waechter B, Holleran JL, Lewis LD, Chow S, Beumer J, Weiss M, Trikalinos N, Faller B, Lustberg M, Rugo HS, Loprinzi C. Dexamethasone to prevent everolimus-induced stomatitis (Alliance MIST Trial: A221701). Semin Oncol. 2023 Feb-Apr;50(1-2):7-10. doi: 10.1053/j.seminoncol.2023.01.001. Epub 2023 Jan 17.
PMID: 36693773BACKGROUNDKuba S, Maeda S, Shibata K, Soutome S, Yamanouchi K, Matsumoto M, Tanaka A, Morita M, Hatachi T, Otsubo R, Yano H, Kawashita Y, Sato S, Taniguchi H, Kanetaka K, Umeda M, Nagayasu T, Eguchi S. EFFICACY AND SAFETY OF A DEXAMETHASONE-BASED MOUTHWASH TO PREVENT CHEMOTHERAPY-INDUCED STOMATITIS IN WOMEN WITH BREAST CANCER: A MULTICENTRE, OPEN-LABEL, RANDOMISED PHASE 2 STUDY. J Evid Based Dent Pract. 2023 Sep;23(3):101896. doi: 10.1016/j.jebdp.2023.101896. Epub 2023 Jun 11.
PMID: 37689451BACKGROUNDRugo HS, Seneviratne L, Beck JT, Glaspy JA, Peguero JA, Pluard TJ, Dhillon N, Hwang LC, Nangia C, Mayer IA, Meiller TF, Chambers MS, Sweetman RW, Sabo JR, Litton JK. Prevention of everolimus-related stomatitis in women with hormone receptor-positive, HER2-negative metastatic breast cancer using dexamethasone mouthwash (SWISH): a single-arm, phase 2 trial. Lancet Oncol. 2017 May;18(5):654-662. doi: 10.1016/S1470-2045(17)30109-2. Epub 2017 Mar 15.
PMID: 28314691BACKGROUND
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Jaymes H Collins, PhD
Woman's Hospital, Louisiana
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 4
- Allocation
- NA
- Masking
- NONE
- Purpose
- PREVENTION
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
December 1, 2025
First Posted
December 17, 2025
Study Start
April 1, 2026
Primary Completion (Estimated)
July 1, 2027
Study Completion (Estimated)
January 1, 2028
Last Updated
March 30, 2026
Record last verified: 2026-03