Check out some of the anti - candida info. that Bubba posted. I have been hearing great things about treelac/threelac (various names) in all the naturopathic circles. Here's one site giving info.
http://www.candidasupport.org/threelac.html and I know that Gene'sallnatural site sells it. I can vouch for him. His products come quickly and I've always been pleased.
The only thing that I don't know is how it will affect an elderly patient. Most naturopaths will state it is less toxic than all the meds that society pops.
Melissa