Quoted from http://www.philly.com/philly/health/topics/HealthDay675895_20130501_Antibiotic_Azithromycin_Won_t_Harm_Healthy_Hearts__Study.html
Antibiotic Azithromycin Won't Harm Healthy Hearts: Study
Kathleen Doheny HealthDay ReporterPosted: Wednesday, May 1, 2013, 5:00 PM
WEDNESDAY, May 1 (HealthDay News) -- The widely used antibiotic azithromycin (Zithromax or Zmax) -- under scrutiny recently because it may increase the risk of death for those with existing heart disease -- appears to be safe for young and middle-aged adults without heart problems, according to a large new study.
Danish researchers evaluated more than a million episodes of azithromycin use, comparing it to both the use of no antibiotics and to the use of penicillin V, from 1997 through 2010. Patients were aged 18 to 64.
"We believe that the results are reassuring," said Henrik Svanstrom, a researcher at Statens Serum Institute, in Copenhagen. His study is published in the May 2 issue of the New England Journal of Medicine.