What do you mean "she has always acted weird"?
Usually when a parasitic infection is actually doing them harm, they lose their appetites, become lethargic, have very runny bowel movements, etc. The reason that I asked about the actual count/load of the Coccidia and whether or not she was displaying symptoms of the Coccidia causing issues is because unfortunately it's very difficult to find a Board-Certified Reptile Vet, or even an experienced Reptile Specialist, most all veterinarians that are willing to see reptiles are simply just "Exotics" Vets, which means nothing other than just that, they are General Vets who are "willing to see" reptiles, birds, rodents, or whatever pet you have. And most all of them are definitely "medication happy" because they don't know much of anything about how the different species of reptiles are effected by different medications, nor do they understand that healthy Dragons live just fine with moderate counts of parasite throughout their GI Tracts. So besides medicating with Anti-parasitic or Anti-Protozoan meds for no reason, they are also passing out Antibiotics and Anti-Fungal meds "Just in Case" or "As Preventative Treatment" and without running ANY diagnostic testing, such as taking a simple culture or running blood work. And this is literally killing many, many Bearded Dragons that were totally healthy and happy when they initially went to see the vet for a simple "check-up"...
The point is that you have to be a proactive Beardie owner and not be afraid to say "NO" to a vet that want to put your Dragon on meds for no good reason at all. If no diagnostic tests are run, if they want to use Antibiotics as "Preventative Medicine" or "Just in Case", and especially if you Dragon isn't sick and it's just a routine check-up, then you must say no to putting them on any unnecessary meds. Their Renal Systems cannot handle them, nor can their GI Tracts.
At least in this instance you got very lucky that they gave him the Toltrazuril, as it's not a harsh Anti-Protozoan drug and he should be fine. But had they given him Albon, which is a Sulfa Drug, he would probably be very ill right now, lethargic and not eating. That's why you have to educate yourself about the meds they prescribe BEFORE you allow them to take them, as some of these meds are literally poisonous to all reptiles and these Exotics vets are not aware of this, it seems like they think they can medicate reptiles the same as they do birds and rodents...
He should be fine, as long as his appetite is still normal and he's not lethargic then he should be okay. The best thing you can do at this point is give him water 2-3 times a day by mouth, dripping it on his snout for him to lick off. Keeping him very well-
hydrated will keep his Kidneys flushed, which is always important whenever they take a medication. You can also give a Probiotic, like Acidophilus, to settle his stomach. Just giving him some Soy Yogurt (Lactose Free), like the Silk brand that is available at any grocery store or Walmart in with the regular yogurt will do the trick. They typically like the fruit flavors, like Strawberry or Blueberry.