Bioequivalence of Losartan and Hydrochlorothiazide (HCTZ) Combination Tablet and Coadministration of Its Components (0954A-306)

This study has been completed.
Information provided by:
Merck Sharp & Dohme Corp. Identifier:
First received: August 4, 2009
Last updated: June 23, 2015
Last verified: June 2015

This study will evaluate the bioequivalence of the losartan/hydrochlorothiazide (HCTZ) combination tablet and coadministration of losartan and hydrochlorothiazide.

Condition Intervention Phase
Drug: losartan potassium (+) hydrochlorothiazide (HCTZ)
Drug: losartan potassium
Drug: hydrochlorothiazide (HCTZ)
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Bio-equivalence Study
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open-Label, Randomized, 2-Period Crossover Study to Evaluate the Bioequivalence After Administration of a Losartan 100-mg/Hydrochlorothiazide 12.5-mg Combination Tablet and the Coadministration of a Currently Marketed COZAAR™ 100-mg Tablet and MICROZIDE™ 12.5 mg Capsule in Healthy Adults

Resource links provided by NLM:

Further study details as provided by Merck Sharp & Dohme Corp.:

Primary Outcome Measures:
  • Area Under the Curve (AUC(0 to Infinity)) of Losartan [ Time Frame: 0 to 36 Hours Post Dose ] [ Designated as safety issue: No ]
  • Peak Plasma Concentration (Cmax) for Losartan [ Time Frame: 36 Hours Post Dose ] [ Designated as safety issue: No ]
    Peak Plasma Concentration (Cmax), or maximal concentration of drug following dosing.

  • Area Under the Curve (AUC(0 to Infinity)) of HCTZ [ Time Frame: 0 to 30 Hours Post Dose ] [ Designated as safety issue: No ]
    Plasma Area Under the Curve, a measure of drug exposure following dosing

  • Peak Plasma Concentration (Cmax) of HCTZ Following Single Dose Administration of Losartan/HCTZ or Losartan and HCTZ [ Time Frame: 30 Hours Post Dose ] [ Designated as safety issue: No ]
    Peak Plasma Concentration (Cmax), or maximal concentration of drug following dosing

Enrollment: 77
Study Start Date: April 2004
Study Completion Date: July 2004
Primary Completion Date: May 2004 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: losartan /HCTZ combination tablet
single dose losartan 100 mg/HCTZ 12.5 mg combination tablet
Drug: losartan potassium (+) hydrochlorothiazide (HCTZ)
Single dose losartan 100 mg/HCTZ 12.5 mg combination tablet in one of two treatment periods.
Active Comparator: losartan tablet + HCTZ capsule
Single dose losartan 100 mg tablet + HCTZ 12.5 mg capsule
Drug: losartan potassium
Single dose losartan 100 mg tablet in one of two treatment periods.
Other Name: COZAAR™
Drug: hydrochlorothiazide (HCTZ)
Single dose HCTZ 12.5 mg capsule in one of two treatment periods.
Other Name: MICROZIDE™


Ages Eligible for Study:   18 Years to 45 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Subject is a healthy male or female between the ages of 18 and 45 years of age
  • Subject does not smoke

Exclusion Criteria:

  • Subject has a history of any illness that might pose additional risk to participation or confound the results of the study
  • Subject has a history of hepatitis B or C or significant drug allergies
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Please refer to this study by its identifier: NCT00953680

Sponsors and Collaborators
Merck Sharp & Dohme Corp.
Study Director: Medical Monitor Merck Sharp & Dohme Corp.
  More Information

Additional Information:
No publications provided

Responsible Party: Executive Vice President, Clinical and Quantitative Sciences, Merck Sharp & Dohme Corp Identifier: NCT00953680     History of Changes
Other Study ID Numbers: 0954A-306, 2009_628
Study First Received: August 4, 2009
Results First Received: May 13, 2010
Last Updated: June 23, 2015
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Angiotensin II Type 1 Receptor Blockers
Angiotensin Receptor Antagonists
Anti-Arrhythmia Agents
Antihypertensive Agents
Cardiovascular Agents
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Natriuretic Agents
Pharmacologic Actions
Physiological Effects of Drugs
Sodium Chloride Symporter Inhibitors
Therapeutic Uses processed this record on July 30, 2015