This site became the new on June 19th. Learn more.
Show more Menu 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... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Mucociliary Clearance in Healthy Subjects: Comparison of Levalbuterol and Racemic Albuterol

This study has been completed.
Information provided by:
Johns Hopkins University Identifier:
First received: May 12, 2006
Last updated: NA
Last verified: April 2006
History: No changes posted
The purpose of this study is to determine whether lung mucociliary clearance (MCC) can be significantly enhanced in healthy subjects by one week of inhalation of nebulized levalbuterol aerosol, as compared to racemic albuterol or placebo. Subjects will inhale one week of levalbuterol, one week of racemic albuterol, and one week of placebo, in a randomized order.

Condition Intervention Phase
Mucociliary Clearance Drug: nebulized albuterol (2.5 mg/3ml/dose) Drug: nebulized levalbuterol (1.25 mg/3ml/dose) Drug: nebulized placebo (3ml/dose) Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: Mucociliary Clearance in Healthy Subjects: Comparison of Levalbuterol and Racemic Albuterol

Resource links provided by NLM:

Further study details as provided by Johns Hopkins University:

Primary Outcome Measures:
  • Lung mucociliary clearance
  • Lung cough clearance

Secondary Outcome Measures:
  • Forced expiratory volume in 1 second
  • Forced vital capacity

Estimated Enrollment: 10
Study Start Date: May 2004
Estimated Study Completion Date: September 2005
Detailed Description:

In healthy lungs, inhaled insoluble material such as bacteria, viruses, antigens, and toxins deposit in the tracheobronchial airway mucus and are removed from the lung in a matter of hours by mucociliary clearance (MCC). When MCC is overwhelmed or impaired, some mucus can be removed by mechanical or cough clearance (CC). Impairment of MCC typically leads to the accumulation of mucus in the airways, and this in turn is associated with acute infections, chronic bacterial colonization, and chronic inflammation.

Racemic albuterol has been shown to stimulate MCC in various patient populations. Inhaled and subcutaneous terbutaline has also been shown to stimulate MCC in healthy subjects. We hypothesize that levalbuterol will be more potent than racemic albuterol in enhancing MCC and CC in healthy subjects.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • non-smoking males and non-pregnant females greater than or equal to 18 years of age
  • forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) greater than or equal to 80% of predicted values
  • normal systolic and diastolic blood pressures

Exclusion Criteria:

  • history of heart disease, irregular heartbeat, hypertension
  • history of diabetes, hyperthyroid
  • history of pneumonia, tuberculosis
  • history of seizure disorder, depression, hospitalization in the last month for non-elective purposes, cold or flu in the previous three months
  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: NCT00325767

United States, Maryland
Eudowood Division of Pediatric Respiratory Sciences
Baltimore, Maryland, United States, 21287
Sponsors and Collaborators
Johns Hopkins University
Study Director: Beth L Laube, Ph.D. Johns Hopkins University
Principal Investigator: Jeffrey C Cleary, M.D. Johns Hopkins University
  More Information Identifier: NCT00325767     History of Changes
Other Study ID Numbers: RPN 04-03-19-11
Study First Received: May 12, 2006
Last Updated: May 12, 2006

Keywords provided by Johns Hopkins University:
mucociliary clearance
beta-adrenergic drugs

Additional relevant MeSH terms:
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Asthmatic Agents
Respiratory System Agents
Tocolytic Agents
Reproductive Control Agents
Adrenergic beta-2 Receptor Agonists
Adrenergic beta-Agonists
Adrenergic Agonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action processed this record on July 27, 2017