Olive oil swish might cut asthma drug side effects
NCT ID NCT07664527
First seen Jun 26, 2026 · Last updated Sep 01, 2026 · Updated 7 times
Summary
This study tests whether an extra virgin olive oil and water mouthwash can remove more leftover asthma medication from the mouth than plain water. The medication residue can cause problems like thrush or sleep apnea. Twenty healthy adults and adults with asthma will rinse with different mixtures and have their rinse samples measured. The study lasts up to 3 weeks.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Extra Virgin Olive Oil and Water mouthwash
- What this could lead to
- If it works, this could point toward a simple way to reduce mouth side effects from inhaled asthma medications.
- What could go wrong
- This is a very small, early proof-of-concept study with only 20 participants. It only tests residue removal, not actual side effect reduction.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 20 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Sep 2026
An estimate. Start dates often move.
- Expected to finish
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Jul 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Healthy adults and adults with asthma, age 18 years and older * Willing to hold orally and nasally inhaled corticosteroids (ICS) for 24h and 12h, respectively, before study visits with mouthwash sample collections (Visit 2 and Visit 3) * No systemic or topical ocular corticosteroid use for the prior 4 weeks. Exclusion Criteria: * Known hypersensitivity to fluticasone propionate * Allergy to olives or olive oil * Known allergy to oxymetazoline * Current smoking or vaping * Currently pregnant or trying to become pregnant.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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University of Wisconsin
Madison, Wisconsin, 53792, United States
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