I am familiar with probiotics...
We use them on a regular basis at work...for dogs, cats, etc. with digestive problems. We use a brand called probiocin. Do you know what the probiotics are for? Well, I'll tell you just in case...it helps to replace the "good" bacteria in the gut which helps with digestion. It DOES help with regurgitation problems. It works really well, actually, but I have not heard of giving it to a reptile before. I will see what I can find out and let you know tomorrow.