Which parasite is Panacur specifically effective against in canines and felines?

Panacur, also known as fenbendazole, is specifically effective against Giardia, a protozoan parasite that can infect both canines and felines. Giardia causes a gastrointestinal infection, leading to symptoms such as diarrhea and vomiting, which can be particularly serious in young animals or those with compromised immune systems.

While Panacur is indeed effective against a range of parasites, including roundworms and some types of tapeworms, its targeted application for Giardia makes it stand out for this particular question. The medication works by interfering with the parasite’s energy metabolism and disrupts its ability to survive within the host's intestines. This targeted action is essential for treating Giardia infections effectively, which is a common concern in veterinary practice.