Of the studies that collected adverse event information (23) none were noted, which is reassuring but makes me skeptical that this information was collected accurately.
I can add to that skepticism.
I had an allergic reaction that my doctor attributed to probiotics. I was prescribed them by another doctor along with antibiotics for a respiratory infection. My face/throat swelled up and I was briefly hospitalized. An allergy test showed that I didn’t have a reaction to the antibiotic. There wasn’t a test specific to the probiotic, though, and my doctor gently recommended that I not take them again, adding a comment that they were not yet rigorously tested in the medical community.
