We just noticed that one of our cats has tape worms. That probably means they all need to be treated. We recently had to treat them for fleas which seem to be gone now. We assume that's how they got the worms since they are all inside cats. It can get pretty expensive getting meds at the vets for 8 cats. I was looking at 1800petmeds.com and found that they have Droncit(Bayer), which is by prescription only and Tape Worm Tabs Feline(Tradewinds), which is OTC. The generic name for both is Praziquantel. The information on both products is identical. Do you think the OTC tablets would work as well as the prescription tablets? I sometimes have to wonder about the things that are sold without a prescription.