It's Sat and I assume there has been some progress, either positive or negative.
A QT can be started (cycled) fairly quickly using bottled active nitrifying bacteria sold by many fish stores and online.
The glycol solvent in Prazipro is a carbon source and bacterial growth scavenges oxygen when it is dosed. When using this medication it is very important to aearate the water with one or more airstones. I like to use one airstone per 30 gallons of water. You'll find that multiple doses of Prazipro ends up just feeding the increasing numbers of bacteria that live off of it, rather than helping the fish. Nonetheless I don't think this fish has worms. (Prazipro is an anthelmintic medication).
Not much history is given for this fish so I can't help much.