Niclosamide monohydrate is widely used as an anthelmintic agent, particularly effective against tapeworm infections in humans and animals. It works by disrupting the energy metabolism of the parasites, leading to their immobilization and subsequent expulsion from the host. In addition to its antiparasitic properties, recent research has explored its potential in cancer therapy, where it has shown promise in inhibiting various signaling pathways involved in tumor growth. It is also being investigated for its antiviral properties, particularly against viruses such as SARS-CoV-2, due to its ability to interfere with viral replication. Furthermore, niclosamide monohydrate has been studied for its role in treating metabolic disorders, including type 2 diabetes, by modulating glucose and lipid metabolism. Its broad-spectrum activity and relatively low toxicity make it a versatile compound in both medical and veterinary applications.