It is quite rare for worms to be passed through faeces, but occasionally a roundworm can be passed, and these will be seen as quite long worms which some people can mistake for tapeworm however this is incorrect as tapeworm will look like grains of rice. As cats are hunters they may acquire other species of tapeworm which may be in long chains- individual flat segments of which may sometimes be passed
The way the drug industry works is that when drugs are new, the drug company that developed them has a patent, that means that no one else can copy them and sell them. This is fair enough, the company that made them has had to spend loads of money developing the drug, licensing it and marketing it; they need to recoup this back. But what happens when the patent runs out?