Lets talk about the probiotic first.
A probiotic, for those who are not familiar with this product, is a way to re-introduce the beneficial bacteria into the gastro-intestinal tract (the guts) of the reptile after their own bacteria in their system has been wiped out by the use of standard antibiotics. A probiotic is the opposite of an antibiotic.
Well, it is well known that antibiotic drugs which we take as humans, or which we give to our reptiles all kill off that beneficial bacteria. After we take a regimen of antibiotic drugs we are supposed to take something like acidophilus to get our system back in balance. If the bacteria is all wiped out, then things like yeast grow in our bodies and begin to mess with our immune system and such like. So we take the acidophilus for a week or more and that usually helps.
With reptiles, after antibiotics, you should use a product like benebac to replace that gut-flora as it is called. It is there to help with digestion. When it is absent, digestion is not complete, the reptile gets a tummy ache, and he won't eat. Or at least we think he has a tummy ache. Most reptiles won't tell us why they don't feel good or why they won't eat. So there is some supposition here.
We have been using Reptaid in our Chameleon breeding facility now for about 18 months or more. We have started breeding geckos also and have been using Reptaid on some geckos just recently also. We used to use Baytril or other drugs but now we only use Reptaid for our antibiotic. And we never use a probiotic. Allow me to repeat that. We NEVER use a probiotic after or while administering Reptaid to any of our animals. If a probiotic was needed, we would use it. And if it was needed, we would not be seeing the incredible results from using Reptaid without any probiotic. So if you ask me for my opinion I would say emphatically that a probiotic is definitely not needed when using Reptaid.
Nevertheless there are members of this forum who feel quite strongly that a probiotic is needed with Reptaid because it is an antibiotic. So if you are so inclined, by all means, please use the probiotic. It won't hurt the dragon, I don't think.
On another note, there have been a lot of people who have written, asking about using Reptaid to restore the appetite of a dragon who went through the standard drug treatment and now he won't eat. And so after receiving assurance from myself or another forum member they get the reptaid , give it to the dragon and presto! Dragon is eating again in no time.
So to draw a conclusion here, I think that Reptaid has its own probiotic qualities within some of those herbs.