My sister has a bad urinary tract infection (went up into her kidneys) and is now on a 14 day course of antibiotics. She was planning to start taking probiotics after she finished, but I've always heard that you should take them while you're taking antibiotics, but no less than 4 hours after each pill.

I've started doing research on this and have found many conflicting reports. So to mrsD or anyone else knowledgeable about the subject, I'd appreciate input as to what the right thing to do is. Take them while on the antibiotics, or wait until after the 14 days? I'm a little nervous about waiting because the course is so long, but I certainly don't want her to do anything to negate the drug.

Thanks in advance for any advice.