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Senior Lecturer, School of Pharmacy, University of Washington, Seattle, WA; Clinical Specialist and Diabetes Educator, Evergreen Community Health Care, Seattle
Clinical Assistant Professor, School of Pharmacy, University of Washington
Reprints: Dr. Odegard, Box 357630, 1959 NE Pacific St., School of Pharmacy, University of Washington, Seattle, WA 98195-7630, fax 206/543-3835, podegard{at}u.washington.edu
OBJECTIVE: To review the pharmacology, pharmacokinetics, efficacy, and safety of Exubera, a novel, dry-powder formulation of insulin for inhalation, and describe patient satisfaction and quality-of-life data.
DATA SOURCES: A MEDLINE search (1966–November 2004) was conducted using the key words inhaled insulin and Exubera for clinical trials limited to human research published in English. BIOSIS Previews and the American Diabetes Association Scientific Abstracts were used for published abstract information.
STUDY SELECTION AND DATA EXTRACTION: All available human studies of Exubera were selected for review. References of identified articles were used for additional citations.
DATA SYNTHESIS: Exubera is a rapid-acting insulin administered by oral inhalation before meals with long-acting insulin administered subcutaneously once or twice daily for type 1 or 2 diabetes mellitus. Exubera provides similar efficacy and improved patient satisfaction compared with standard subcutaneous insulin therapy (ie, NPH twice daily with regular insulin before meals). Efficacy has also been demonstrated for Exubera when used as adjunctive therapy with oral medications for type 2 diabetes. The onset of Exubera is more rapid and its duration of action is similar to that of regular insulin. To date, Exubera administered before meals with a once-daily long-acting subcutaneous insulin (usually Ultralente) has been compared with standard subcutaneous NPH/regular insulin regimens. Comparison of premeal Exubera plus a basal long-acting insulin analog (eg, glargine) with a regimen of premeal subcutaneous rapid-acting insulin analog (eg, lispro or aspart) plus a basal long-acting insulin analog (eg, glargine) is needed to fully evaluate Exubera. Pulmonary safety appears to be maintained for up to 4 years, although there are no data, as of this writing, on the use of this agent in patients with pulmonary conditions.
CONCLUSIONS: Exubera is an effective inhaled insulin for preprandial use in type 1 or 2 diabetes. Improved patient satisfaction over injected insulin increases its potential for use earlier in the treatment of type 2 diabetes.
Key Words: Exubera, inhaled insulin
Published Online, April 12, 2005. www.theannals.com, DOI 10.1345/aph.1E522
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