Hey there, I had camillanus in some of my fish a while back, and got given some Levamisole, it worked a treat and the fish were fine throughout the whole process. Here's how it goes.
Do a really big water change; 90% or so making sure to vacuum the bottom of the tank well. Add the amount of levamisole needed for your sized tank (1mL per 20L) (pays to get a cup of aquarium water and mix in the levamisole to that, then tip it into the tank). Make sure to monitor your fish well throughout the medication, you can do a 48 hour treatment if the fish look fine, but 24 hours will suffice. After the 24/48 hours do another massive 90% water change making sure to vacuum the bottom really well again. Wait two weeks, then repeat the whole process.
Hopefully your fish will be fine after this.