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Levothyroxine Treatment in Thyroid Benign Nodular Goiter

This study has been completed.
Information provided by:
National Taiwan University Hospital Identifier:
First received: October 30, 2007
Last updated: December 21, 2010
Last verified: December 2010
We will study the effect of taking eltroxin at different time, i.e. fasting or postprandial periods. We will also study the effect of levothyroxin treatment in Chinese people

Condition Intervention
Thyroid Nodule Drug: Levothyroxin treatment

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Levothyroxine Treatment in Thyroid Benign Nodular Goiter

Resource links provided by NLM:

Further study details as provided by National Taiwan University Hospital:

Primary Outcome Measures:
  • The size of thyroid nodules [ Time Frame: 3 months after levothyroxine treatment ]

Enrollment: 10
Study Start Date: October 2007
Study Completion Date: July 2008
Primary Completion Date: July 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
under eltroxin
Drug: Levothyroxin treatment
Levothyroxin 100 micogram will be administered once daily 1 hour before meal of just after meal for 3 months, and the dose will be titrate to keep serum TSH level between 0.1~0.3 mU/L. It will be discontinued for 3 months. Then

Detailed Description:

OBJECTIVE - Current treatment of benign thyroid is oral levothyroxin by suppression of thyrotropin secretion and so that tumor growth. Although current consensus is taking thyroxin one hour before meal because the PH value of gastrointestinal tract will affect drug absorption, some patient suffered from epigastric discomfort when taking thyroxin with empty stomach, and wish to take it postprandial. However, there is no direct evidence showing if taking thyroxin at different time point significantly affects treatment outcome. Besides, the response to thyroxin therapy differs among people. The purposes of this study are to evaluate the clinical significance of different time points of thyroxine intake and to search factors relating to thyroxin response of benign thyroid tumors.

RESEARCH DESIGN AND METHODS - We will include patients who have benign thyroid tumors diagnosed with fine needle aspiration cytology and have normal thyroid function into our study. After informed consent, patients will be randomly assigned into two groups. Patients in the first group will take thyroxin one hour before breakfast until thyrotropin level stabilized between 0.5 and 1.0 mU/L for 3 months. Then thyroxin will be discontinued. Patients will restart thyroxin therapy three months later but after breakfast. Patients in another group will take thyroxin postprandial, discontinue thyroxin and then one hour before breakfast. Questionnaire interviews about diet and life style, blood samples and fine needle aspiration cytology samples will be obtained. Changes of thyroid nodules will be evaluated with thyroid echo.

STATISTIC ANALYSIS - Descriptive data will be described as means and SDs for continuous variables, and analysis of variance and Chi-square tests were used for assessing the significances. A p-value below 0.05 was considered significant.

Keywords: benign thyroid tumor, thyroxin, preprandial, postprandial.


Ages Eligible for Study:   20 Years to 90 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. age between 20 to 90 years old
  2. Benign nodular goiter diagnosed with thyroid echo and fine-needle - aspiration cytology

Exclusion Criteria:

  1. Age younger than 20 or older than 90 years old
  2. Pregnancy
  3. Allergy to eltroxin
  4. Taking other drugs which will have drug interaction with eltroxin
  5. patients with cardiovascular disease, hypertension, gastrointestinal disease
  Contacts and Locations
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Please refer to this study by its identifier: NCT00552253

National Taiwan University Hospital
Dou-Liou city, Yun-Lin County, Taiwan
Sponsors and Collaborators
National Taiwan University Hospital
Principal Investigator: Shyang-Rong Shi, M.D. National Taiwan University Hospital, Yun-Lin Branch
  More Information

Responsible Party: Shyang-Rong, Shih, MD, National Taiwan University Hospital, Internal Medicine Identifier: NCT00552253     History of Changes
Other Study ID Numbers: 200612016M
Study First Received: October 30, 2007
Last Updated: December 21, 2010

Additional relevant MeSH terms:
Thyroid Diseases
Thyroid Nodule
Goiter, Nodular
Endocrine System Diseases
Thyroid Neoplasms
Endocrine Gland Neoplasms
Neoplasms by Site
Head and Neck Neoplasms
Goiter processed this record on August 22, 2017