As long as you take them 2 hours apart you can take anything you want while cleasning with P&B shakes.
A lot of us here like Primal Defense.
Another excellent option is to have live acidophilus implanted via enema bulb or by your colonicist.
A good diet will ensure healthy balance of microbes too. :) Occasional organic, plain yoghurt, plenty of veggies, avoid refined sugars and flour, that kind of thing.