Originally Posted by mysiak
Or just get Esha Gdex, it's already dissolved, from reputable company, tested by many aquarists and available in Greece as well (per Google, 1 ml contains: 66 mg of praziquantel).
YES! THANK YOU!!! I should have checked local aquarium stores before thinking of the cat med solution! Google gave me Drontal as one of the medicines that include Praziquantel. I thought of the above as I periodically give my cat Drontal, but I'll definitely prefer esha gdex if the problem reoccurs. An aquarium specific med is what I'll prefer if it comes down to it.