Just do it. Prazi is pretty harmless..
In addition to prazi, you should also do a light half strength levamisole hydrochloride dose in the quarantine too, if you have some. Just in case of camallanus worms lurking around in the intestines of your datnoid that is not easily detectable until the worms grow into a large enough size.. Repeat dose for a total of three times. FYI this is a really nasty, sneaky parasite that kills fish on the inside slowly over time and then pops out as a red thread on a fish's anus once they multiply and grow enough.. So I'd keep an eye on the datnoid for a while making sure he/she doesn't have any red little worms hanging on it's butt at all, if it does, definitely go for levamisole, it has worked well for me and has cured my fish with the issue, but be careful NOT to overdose.. it irritates the stomach of all fish, so they can flush out whatever is in their belly, (for example: the worms get paralyzed first and the fish is able to crud them out) watch out, a super strength dose could kill fish.. I have sadly lost some due to regular normal strength. Lighter, half strength is the way to go and it has worked for me. I have lost a lot of my trophy fish to this stealthy parasitic worm, and I don't want you to go through the same! Sometimes they require an intermediate host, and sometimes they don't.. the ones that doesn't require a host is pretty deadly. Research on it.
**EDIT**
Oh yeah, you can find some levamisole hydrochloride from pig, bird dewormers at places that sell animal farm meds.