Fasting Study of Levothyroxine Sodium Tablets 300 μg to Synthroid® Tablets 300 μg

This study has been completed.
Sponsor:
Information provided by:
Mylan Pharmaceuticals
ClinicalTrials.gov Identifier:
NCT00647855
First received: March 30, 2008
Last updated: March 31, 2008
Last verified: March 2008
  Purpose

The objective of this study was to investigate the bioequivalence of Mylan's levothyroxine sodium 300 μg tablets to Abbott's Synthroid® 300 μg tablets following a single 600 μg (2 x 300 μg) dose administered in healthy volunteers under fasting conditions. Single-dose pharmacokinetic parameters for baseline corrected total L-thyroxine and non-baseline corrected total L-triiodothyronine were calculated using noncompartmental techniques.


Condition Intervention Phase
Healthy
Drug: Levothyroxine Sodium Tablets 300 μg
Drug: Synthroid® Tablets 300 μg
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Bio-equivalence Study
Intervention Model: Crossover Assignment
Masking: Open Label
Official Title: Single-Dose Fasting In Vivo Bioequivalence Study of Levothyroxine Sodium Tablets (300 μg; Mylan) to Synthroid® Tablets (300 μg; Abbott) in Healthy Volunteers.

Resource links provided by NLM:


Further study details as provided by Mylan Pharmaceuticals:

Primary Outcome Measures:
  • Bioequivalence [ Time Frame: within 30 days ] [ Designated as safety issue: No ]

Enrollment: 30
Study Start Date: May 2003
Study Completion Date: June 2003
Primary Completion Date: June 2003 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
Levothyroxine Sodium Tablets 300 μg
Drug: Levothyroxine Sodium Tablets 300 μg
2x300mcg, single dose fasting
Active Comparator: 2
Synthroid® Tablets 300 μg
Drug: Synthroid® Tablets 300 μg
2x300mcg, single dose fasting

  Eligibility

Ages Eligible for Study:   18 Years to 50 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  1. Age: 18-50 years.
  2. Sex: Men and/or non-pregnant, non-lactating women.

    1. Women of childbearing potential must have negative serum β human chorionic gonadotropin (HCG) pregnancy tests performed within 14 days prior to of the study and on the evening prior to each dose administration. An additional serum (β HCG) pregnancy test will be performed upon completion of the study.
    2. Women of childbearing potential must practice abstinence or be using an acceptable form of contraception throughout the duration of the study. Oral contraceptives are not to be used within 3 months prior to dosing and throughout the course of the study due to the fact that they increase serum TBG concentrations, and therefore, elevate T4. Acceptable forms of contraception include the following:

      1. intrauterine device in place for at least 3 months prior to the start of the study and remaining in place during the study period, or
      2. barrier methods containing or used in conjunction with a spermicidal agent, or
      3. postmenopausal accompanied with a documented postmenopausal course of at least one year or surgical sterility (tubal ligation, oophorectomy or hysterectomy).
  3. Weight: At least 60 kg (132 lbs) for men and 48 kg (106 lbs) for women, and within 15% of Ideal Body Weight (IBW), as referenced by the Table of "Desirable Weights of Adults" Metropolitan Life Insurance Company, 1983 (See Part II Administrative Aspects of Bioequivalence Protocols).
  4. All subjects should be judged normal (euthyroid) and healthy during a prestudy medical evaluation (physical examination, laboratory evaluation, blood chemistry, serum T4 (free and total), serum T3 (total only), serum thyroid-stimulating hormone (TSH), serum thyroxine-binding globulin (TBG), hepatitis B and hepatitis C tests, HIV test, 12-lead ECG, and urine drug screen including amphetamine, barbiturates, benzodiazepine, cannabinoid, cocaine, opiate screen, phencyclidine, and methadone) performed within 14 days of the initial dose of study medication.

Exclusion Criteria:

  1. Institutionalized subjects will not be used.
  2. Social Habits:

    1. Use of any tobacco products within 1 year of the initial study drug administration.
    2. Ingestion of any alcoholic, caffeine- or xanthine-containing food or beverage within the 48 hours prior to the initial dose of study medication.
    3. Ingestion of any vitamins within the 48 hours prior to the initial dose of the study medication.
    4. Any change in dietary or exercise habits throughout the duration of the study.
  3. Medications:

    1. Use of any medication within the last 30 days prior to the initial dose of study medication, during the study or during the washout period. These may include but is not limited to: infant soybean formula, steroids, salicylates, androgenic or estrogenic hormones including oral contraceptives; preparations containing iodine, such as vitamins; oral anti-diabetic agents; all resins for lowering of cholesterol, such as cholestyramine; sucralfate, propranolol, amiodarone, phenytoin, carbamazepine, furosemide; aluminum-containing antacids, including aluminum hydroxide; rifampin, calcium channel blockers and ferrous sulfate.
    2. Use of any medication known to alter hepatic enzyme activity within 28 days prior to the initial dose of study medication.
  4. Diseases:

    1. History of any significant chronic disease and/or hepatitis.
    2. History of drug and/or alcohol abuse.
    3. Acute illness at the time of either the prestudy medical evaluation or dosing.
    4. History of any thyroid disease.
    5. Subjects with any underlying medical condition known to interfere with the absorption or metabolism of thyroid hormones.
  5. Abnormal and clinically significant laboratory test results:

    1. Clinically significant deviation from the Guide for Clinically Relevant Abnormalities (See Part II Administrative Aspects of Bioavailability Protocols).
    2. Abnormal and clinically relevant ECG tracing.
    3. Abnormal thyroid function tests.
  6. Donation or loss of a significant volume of blood or plasma (> 450 ml) within 28 days prior to the initial dose of study medication.
  7. Subjects who received any surgical treatment within 6 months prior to the initial dose of study medication.
  8. Subjects with known allergies or hypersensitivity to thyroid preparations.
  9. Subjects who have received an investigational drug within 30 days prior to the initial dose of study medication.
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00647855

Locations
United States, North Dakota
PRACS Institute, Ltd.
Fargo, North Dakota, United States, 58104
Sponsors and Collaborators
Mylan Pharmaceuticals
Investigators
Principal Investigator: James D Carlson, Pharm. D. PRACS Institute Ltd.
  More Information

Additional Information:
No publications provided

Responsible Party: Will Sullvan, Global Head of Product Risk and Safety Management, Mylan Inc.
ClinicalTrials.gov Identifier: NCT00647855     History of Changes
Other Study ID Numbers: LEVO-0323
Study First Received: March 30, 2008
Last Updated: March 31, 2008
Health Authority: United States: Institutional Review Board

ClinicalTrials.gov processed this record on April 20, 2014