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Atazanavir Twice Daily

This study has been completed.
Information provided by:
Bristol-Myers Squibb Identifier:
First received: July 25, 2006
Last updated: April 5, 2011
Last verified: April 2011
The purpose of this clinical research study is to assess the pharmacokinetics of atazanavir administered twice-daily relative to historical data from atazanavir/ritonavir 300/100 mg, given once daily.

Condition Intervention Phase
HIV Infections
Protease Inhibitor
Drug: Atazanavir Sulphate
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Open Label
Official Title: Randomized, Open-Label, Multiple-Dose Study to Evaluate the Pharmacokinetics of Atazanavir Administered Twice-Daily in Health Subjects

Resource links provided by NLM:

Further study details as provided by Bristol-Myers Squibb:

Primary Outcome Measures:
  • Assess the pharmacokinetics (PK) of atazanavir administered twice-daily (BID) relative to historical data from atazanavir/ritonavir 300/100 mg, given once-daily.

Secondary Outcome Measures:
  • Assess the dose proportionality and the diurnal variation in the PK of atazanavir given BID
  • Assess the effect of atazanavir BID on bilirubin values and explore the relationship between bilirubin and atazanavir dose level/exposure by UGT1A1 genetic isoform
  • Assess the effect of atazanavir BID on metabolic parameters
  • Assess the safety and tolerability of atazanavir when administered BID

Estimated Enrollment: 18
Study Start Date: June 2006
Study Completion Date: September 2006
Primary Completion Date: September 2006 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: A1 Drug: Atazanavir Sulphate
Capsules, Oral, 200 mg, twice daily, 7 days.
Other Name: Reyataz
Active Comparator: A2 Drug: Atazanavir Sulphate
Capsules, Oral, 300 mg, twice daily, 8 days.
Other Name: Reyataz
Active Comparator: A3 Drug: Atazanavir Sulphate
Capsules, Oral, 400 mg, twice daily, 9 days.
Other Name: Reyataz


Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy male and female subjects between the ages of 18 to 45 years old with a BMI of 18 to 30 kg/m2
  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: NCT00357721

United States, New Jersey
Local Institution
Hamilton, New Jersey, United States
Sponsors and Collaborators
Bristol-Myers Squibb
Study Director: Bristol-Myers Squibb Bristol-Myers Squibb
  More Information

Additional Information: Identifier: NCT00357721     History of Changes
Other Study ID Numbers: AI424-286
Study First Received: July 25, 2006
Last Updated: April 5, 2011

Additional relevant MeSH terms:
HIV Infections
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Atazanavir Sulfate
HIV Protease Inhibitors
Protease Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Anti-HIV Agents
Anti-Retroviral Agents
Antiviral Agents
Anti-Infective Agents processed this record on May 25, 2017