CompletedNot Applicable

Impact of Chewing Gum on FeNO Levels in Patients With Bronchial Asthma

Germany30 participantsStarted 2025-08-01

Plain-language summary

The aim of the study is to investigate the influence of chewing gum consumption on FeNO levels in asthma patients in order to avoid systematic errors in treatment decisions.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. have known bronchial asthma with a FeNO level ≥25 ppb at regular medical checkups
. are of legal age
. are mentally and physically capable of understanding the significance and scope of the study and obeying the instructions of study personnel
. are legally competent and have signed the informed consent form.

Exclusion criteria

. Current or past medically relevant illness or treatment that could impact the evaluability of the study.
. FeNO levels \< 25 ppb
. Medical contraindications to conducting FeNO measurements
. Expected unwillingness to actively participate in study-related measures.
. Known allergies or intolerances to the contents of chewing gum
. Smoking, alcohol consumption, mouthwash use, chewing gum/candy/lettuce/spinach/kale/beetroot/radish/sausage consumption, or exercise on the day of the study.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

FeNO measurement after 15 minutes of consuming sugar-free, antioxidant-containing chewing gum

Timeframe: 15 Minutes

Trial details

NCT IDNCT07053956

SponsorRWTH Aachen University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2025-12-17

View on ClinicalTrials.gov More Asthma Bronchiale trials