Try our beta test site
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...

Efficacy of Dark Chocolate in Achalasia Patients

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified November 2008 by Tel-Aviv Sourasky Medical Center.
Recruitment status was:  Not yet recruiting
Information provided by:
Tel-Aviv Sourasky Medical Center Identifier:
First received: November 12, 2008
Last updated: NA
Last verified: November 2008
History: No changes posted

Flavanols, present in dark chocolate, were shown to induce Nitric Oxide synthesis. Since Nitric Oxide facilitates smooth muscle relaxation, it might ease the relaxation of the LES (lower esophageal sphincter)as well.

The objective of the present study is to evaluate tha efficacy of dark chocolate in improving LES relaxation in achalasia patients.

Condition Intervention Phase
Dietary Supplement: dark chocolate
Dietary Supplement: placebo chocolate with crossover to dark chocolate
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Efficacy of Dark Chocolate in Achalasia Patients: Placebo-Controlled Study

Resource links provided by NLM:

Further study details as provided by Tel-Aviv Sourasky Medical Center:

Primary Outcome Measures:
  • Lower Esophageal Sphincter relaxation before and after dark chocolate consumption. [ Time Frame: day 1 ]

Secondary Outcome Measures:
  • achalasia symptoms before and during dark-chocolate consumption [ Time Frame: 2 weeks ]

Estimated Enrollment: 40
Study Start Date: November 2008
Estimated Study Completion Date: November 2010
Estimated Primary Completion Date: November 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
dark chocolate consumption during manometry and 2 weeks treatment with dark chocolate
Dietary Supplement: dark chocolate
21 g/d of dark chocolate for 2 weeks (7 g. before each meal). 7 grams of dark chocolate at day 1 during manometry.
Other Name: FruiBel chocolate, Belgium.
placebo comparator: 7 grams of placebo-chocolate at day 1 during manometry, and than crossover to treatment with dark chocolate for 2 weeks.
Dietary Supplement: placebo chocolate with crossover to dark chocolate
Placebo at day 1 during manometry, and than crossover to dark chocolate for 2 weeks treatment.
Other Name: FruiBel chocolate, Belgium


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • clinical diagnosis of "achalasia"
  • "Achalasia" diagnosis during manometry at day 1 of the study.

Exclusion Criteria:

  • pregnancy
  • pseudoachalasia
  • consumption of GI-motility modifiers durin 72 hours preceding the study.
  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.

No Contacts or Locations Provided
  More Information

Responsible Party: Dr. Guy Rosner, gastroenterologist, Tel-Aviv Sourasky Medical Center Identifier: NCT00790465     History of Changes
Other Study ID Numbers: TASMC-08-GR-370-CTIL
Study First Received: November 12, 2008
Last Updated: November 12, 2008

Keywords provided by Tel-Aviv Sourasky Medical Center:
lower esophageal sphincter
nitric oxide
dark chocolate

Additional relevant MeSH terms:
Esophageal Achalasia
Esophageal Motility Disorders
Deglutition Disorders
Esophageal Diseases
Gastrointestinal Diseases
Digestive System Diseases processed this record on May 23, 2017