Primarily used in organic synthesis, it serves as a reagent for the preparation of various pharmaceutical compounds. It is particularly effective in the synthesis of antihelmintic drugs, which are used to treat parasitic worm infections. Additionally, it finds application in the production of polymers and as a catalyst in certain chemical reactions, enhancing the efficiency and yield of the processes. Its role in the development of new medicinal agents is significant, contributing to advancements in therapeutic treatments. Piperazine dihydriodide is also utilized directly as an anthelmintic agent in veterinary medicine for treating parasitic infections in animals.