I just read a really disturbing news article about azithromycin on Yahoo. Apparently Vanderbilt has discovered some antibiotics have an increased risk of sudden death if heart patients take them and azithromycin (zithromax) may be one of them. I've taken azithromycin SEVERAL times for twice yearly bronchitis/walking pneumonia/sinus infections. I've given JSmiley azithromycin (liquid). I'm going to have to figure out a way to follow this and ask Dr. M. I'm seriously disturbed right now.