Thank you Onward. Great info. My doctor said I could stop the antibiotic since the problem seems to have been heart related... And today things seem to be calming down. I am aware that probiotics are different but I bought the same one that I took with the same antibiotic last time the pneumonia struck, that time it kept me surprizingly perfectly fine through my entire course of antibiotic. Guess all things were not equal. I'll keep this handy if I want to try something different, I'm not out of the woods yet but today definitely much less distress so far.