My cat tested positive for Giardia, in addition to tapeworm. They treated the tapeworm in the hospital with one course of medication. But the Giardia diagnosis had to be confirmed by lab. When the vet called me with the diagnosis he wants me to put her on Metronidazole AND Pancure - together. In addition, he suggests that the other cats in the house need to be treated, even though they have no symptoms. I think this is very aggressive threapy. I read up on Giardia, and it is usually not serious, except in very old cats or kittens. It is also very stubborn, and hard to get rid of for good. My cats are young and (otherwise) healthy animals, between 1-3 years old. They get a high quality diet. I am very tempted to avoid treatment with these nasty drugs - and let well enough alone. Am I being unwise??