Stimulation of Sensation and Improvement in Swallowing Using Oral Capsaicin

This is a research study to learn more about whether capsaicin, a natural ingredient of chili peppers that makes them taste "hot", can improve swallowing function. The purpose of this study is to evaluate whether sucking on a capsaicin lozenge improves sensation in the throat enough to improve swallowing function.

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Key information

Conditions

Dysphagia Conversion Disorder Deglutition Disorders Digestive System Diseases Esophageal Diseases Esophageal Motility Disorders Gastroesophageal Reflux Gastrointestinal Diseases Globus Sensation Mental Disorders Otorhinolaryngologic Diseases Pharyngeal Diseases Somatoform Disorders

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

University of California Davis Medical Center

Sacramento, California, 95817, United States

About this study

Swallowing problems are encountered frequently in primary practice and in the hospital setting. The list of possible causes is large, ranging from strokes and neurological disease through to complications of cancer treatment, acid reflux, and surgery. Many patients have a reduced ability to feel food and fluid (reduced sensation) within the throat (pharynx) and this leads to inability to manipulate food and fluids in the correct manner. This can produce a variety of swallowing problems such as choking on foods and fluids, regurgitation, aspiration, weight loss, malnutrition and poor quality of life.

Treatment is largely directed at rehabilitation of muscle power and education about safe swallowing techniques or positioning that limits food and fluid entering the airway. A novel approach is to try to improve sensation within the pharynx so that patients can feel substances present and then manipulate them in a more appropriate and safe manner. In this regard capsaicin, a nutritional supplement derived from peppers, has shown a stimulatory effect on sensory nerves and an ability to improve the swallowing reflex (Ebihara et al., 2005). Although studies have shown that capsaicin can improve the swallowing reflex, data regarding improvement in swallowing function is lacking. Using a small dose of capsaicin administered as a lozenge, we hope to stimulate sensation within the pharynx enough to improve physical swallowing measures on a contrast swallow study. This method of application is comfortable, easy and directed to the site of action.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Patients older than 18 years of age
Patients with the following condition: dysphagia, globus, gastroesophageal reflux, neurological disease affecting swallowing or any other condition requiring dynamic swallow study
Patients willing to provide written informed consent for their participation in the study

Exclusion criteria

Patients unable to complete a full dynamic swallow study protocol
Patients enrolled in another investigational clinical trial that interferes with any testing or testing results
Patients who are pregnant
Patients with known sensitivities or allergies to capsaicin or peppers, or nightshades (tomato, bell pepper, eggplant) or latex
Patients who are prisoners
Patients who are unable to keep a capsaicin lozenge in their mouth safely for 5 minutes

Treatment and study plan

Primary outcomes

Improvement in sensation and swallowing after using oral capsaicin

Time frame: Outcome measure will be determined during the conduction of the dynamic swallow study

Pt will undergo a standard protocol for conducting dynamic swallow studies with the use of increasing increments of liquid barium, followed by paste consistency and solid consistency barium items, then large volume and continuous drinking of barium. Pictures are taken in both lateral and anteroposterior views. Patients enrolled in the study will undergo the usual protocol but instead of the straw drinking large volume liquid bolus, they will first receive the capsaicin 0.1mg lozenge then after sucking that for 5 minutes will swallow a second 20cc bolus of liquid contrast agent in lateral view. The lozenge is an FDA approved food nutritional supplement and is available in several forms over-the-counter without a prescription. The capsaicin lozenge we will use will be a 0.1mg lozenge. This is a very small concentration of the supplement. We expect this to take no more than 5 minutes to fully dissolve. They will then finish the protocol (AP views) as usual.

Sponsors and collaborators

Lead sponsor

University of California, Davis

Other

Registry information

Important dates

Study start: 2009
Primary completion: 2012
Study completion: 2012
First posted: Jan 21, 2010
Registry last updated: May 30, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed