I may not be the best person to ask...I was lucky to get one probiotic a day in when I was on the antibiotics. After some reading, the most common threads in the non-advertising articles were variety & freshness. So each month, I reached for a good name brand, different from the last two or three I had taken, on the shelf in my very busy Walgreens store. At the time, there was one (don't know which) that was called Antibiotic Support - it seemed to have a very good variety of cultures. It is what I shop for now if I have to take any antibiotics.
Sue

I take 1 probiotic (Prevagen) that you can get at the pharmacy with no prescription. The pharmacist said he takes one everyday. I also try and eat yogurt at least 4 hours after antibiotics and it seems to be keeping my gut healthy.