The New England Journal of Medicine
e-mail icon  FREE NEJM E-TOC    HOME   |   SUBSCRIBE   |   CURRENT ISSUE   |   PAST ISSUES   |   COLLECTIONS   |    Advanced Search
Sign in | Get NEJM's E-Mail Table of Contents — Free | Subscribe
 
Original Article
PreviousPrevious
Volume 335:392-398 August 8, 1996 Number 6
NextNext

Prophylaxis against Disseminated Mycobacterium avium Complex with Weekly Azithromycin, Daily Rifabutin, or Both
Diane V. Havlir, M.D., Michael P. Dubé, M.D., Fred R. Sattler, M.D., Donald N. Forthal, M.D., Carol A. Kemper, M.D., Michael W. Dunne, M.D., David M. Parenti, M.D., James P. Lavelle, M.D., A. Clinton White, M.D., Mallory D. Witt, M.D., Samuel A. Bozzette, M.D., Ph.D., J. Allen McCutchan, M.D., for The California Collaborative Treatment Group

 Sign up for free e-toc
 

This Article
-Full Text
- PDF

Tools and Services
-Add to Personal Archive
-Add to Citation Manager
-Notify a Friend
-E-mail When Cited

More Information
-PubMed Citation
ABSTRACT

Background Azithromycin is active in treating Mycobacterium avium complex disease, but it has not been evaluated as primary prophylaxis in patients with human immunodeficiency virus (HIV) infection. Because the drug is concentrated in macrophages and has a long half-life in tissue, there is a rationale for once-weekly dosing.

Methods We compared three prophylactic regimens in a multicenter, double-blind, randomized trial involving 693 HIV-infected patients with fewer than 100 CD4 cells per cubic millimeter. The patients were assigned to receive rifabutin (300 mg daily), azithromycin (1200 mg weekly), or both drugs. They were monitored monthly with blood cultures for M. avium complex.

Results In an intention-to-treat analysis, the incidence of disseminated M. avium complex infection at one year was 15.3 percent with rifabutin, 7.6 percent with azithromycin, and 2.8 percent with both drugs. The risk of the infection in the azithromycin group was half that in the rifabutin group (hazard ratio, 0.53; P = 0.008). The risk was even lower when two-drug prophylaxis was compared with rifabutin alone (hazard ratio, 0.28; P<0.001) or azithromycin alone (hazard ratio, 0.53; P = 0.03). Among the patients in whom azithromycin prophylaxis was not successful, 11 percent of M. avium complex isolates were resistant to azithromycin. Dose-limiting toxic effects were more common with the two-drug combination than with azithromycin alone (hazard ratio, 1.67; P = 0.03). Survival was similar in all three groups.

Conclusions For protection against disseminated M. avium complex infection, once-weekly azithromycin is more effective than daily rifabutin and infrequently selects for resistant isolates. Rifabutin plus azithromycin is even more effective but is not as well tolerated.


Source Information

From the University of California, San Diego, and the Veterans Affairs Medical Center, La Jolla, Calif. (D.V.H., S.A.B., J.A.M.); the University of Southern California, Los Angeles (M.P.D., F.R.S.); the University of California, Irvine (D.N.F.); Santa Clara Valley Medical Center, San Jose, Calif. (C.A.K.); Pfizer Central Research, Groton, Conn. (M.W.D.); George Washington University, Washington, D.C. (D.M.P.); Georgetown University, Washington, D.C. (J.P.L.); Baylor College of Medicine, Houston (A.C.W.); Harbor–UCLA Medical Center, Torrance, Calif. (M.D.W.); and the RAND Health Science Program, Santa Monica, Calif. (S.A.B.). Other authors who contributed to this study were Stephen D. Nightingale, M.D. (University of Texas Southwestern Medical Center, Dallas); Kent A. Sepkowitz, M.D. (New York Hospital–Cornell Medical Center, New York); Rob Roy MacGregor, M.D. (University of Pennsylvania, Philadelphia); Sarah H. Cheeseman, M.D. (University of Massachusetts, Worcester); Francesca J. Torriani, M.D. (University of California, San Diego); Michael T. Zelasky, M.S., Debra J. Williams, M.D., Ph.D., and Scott J. Hopkins, M.D. (Pfizer Central Research, Groton, Conn.); and Princy N. Kumar, M.D. (Georgetown University, Washington, D.C.).Presented in part at the Third Conference on Retroviruses and Opportunistic Infections, Washington, D.C., January 28–February 1, 1996.

Address reprint requests to Dr. Havlir at the UCSD Treatment Center, University of California, San Diego, 2760 Fifth Ave., Suite 300, San Diego, CA 92103.

Full Text of this Article


This article has been cited by other articles:



HOME  |  SUBSCRIBE  |  SEARCH  |  CURRENT ISSUE  |  PAST ISSUES  |  COLLECTIONS  |  PRIVACY  |  TERMS OF USE  |  HELP  |  beta.nejm.org

Comments and questions? Please contact us.

The New England Journal of Medicine is owned, published, and copyrighted © 2009 Massachusetts Medical Society. All rights reserved.