Mouthwash may tame chemo side effect in breast and lung cancer

NCT ID NCT06974604

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This phase 2 trial tests whether a dexamethasone mouthwash can lower the chance of painful mouth sores (stomatitis) caused by the cancer drug datopotamab deruxtecan. About 60 people with advanced breast or lung cancer will use the mouthwash for the first five days of each treatment cycle. The goal is to reduce mouth sore rates by 20% compared to historical data.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance

dexamethasone mouthwash

What this could lead to

If it works, this could provide a simple way to prevent painful mouth sores in patients receiving this type of chemotherapy, improving their quality of life during treatment.

What could go wrong

This is a small, early-phase trial with only 60 participants and no comparison group, so results may not be definitive. The mouthwash may not reduce sores enough to be clinically meaningful.

Disclaimer Read more

This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.

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Conditions

The condition(s) this trial relates to.

breast neoplasm hormone receptor-positive breast cancer lung neoplasm non-small cell lung carcinoma triple-negative breast carcinoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Rhode Island and the Miriam Hospitals (Brown University Health)

    RECRUITING

    Providence, Rhode Island, 02903/02906, United States

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact Phone: •••-•••-•••• Email: •••••@•••••