This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Stimulation of Sensation and Improvement in Swallowing Using Oral Capsaicin

This study has been completed.
Information provided by (Responsible Party):
University of California, Davis Identifier:
First received: October 20, 2009
Last updated: May 25, 2017
Last verified: May 2017
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.

Dysphagia Gastroesophageal Reflux

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Cross-Sectional
Official Title: Stimulation of Sensation and Improvement in Swallowing Using Oral Capsaicin

Resource links provided by NLM:

Further study details as provided by University of California, Davis:

Primary Outcome Measures:
  • 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.

Enrollment: 19
Study Start Date: October 2009
Study Completion Date: July 2012
Primary Completion Date: July 2012 (Final data collection date for primary outcome measure)
Detailed Description:

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.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Otolaryngology clinic

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
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01053286

United States, California
University of California Davis Medical Center
Sacramento, California, United States, 95817
Sponsors and Collaborators
University of California, Davis
Principal Investigator: Peter A Belafsky, MD, Ph.D. University of California, Davis
  More Information

Responsible Party: University of California, Davis Identifier: NCT01053286     History of Changes
Other Study ID Numbers: 200917225
Study First Received: October 20, 2009
Last Updated: May 25, 2017

Keywords provided by University of California, Davis:
Gastroesophageal reflux

Additional relevant MeSH terms:
Gastroesophageal Reflux
Deglutition Disorders
Esophageal Motility Disorders
Esophageal Diseases
Gastrointestinal Diseases
Digestive System Diseases
Pharyngeal Diseases
Otorhinolaryngologic Diseases
Dermatologic Agents
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs processed this record on July 26, 2017