The little guys break down lactose. I never heard that they can break down antibiotics in the same manner. I don't see how this bacteria would make antibiotics ineffective. I guess I would separate administering them until about an hour after taking the antibiotic to be safe. By the way, I will be going on my annual Haiti Medical Mission for the next several weeks, so I will be NOMAIL at the end of this week until I get back. Frank J. Nice, DPA, CPHP *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html