Which anthelmintic agent is primarily used for treating tapeworm infections?

Praziquantel is identified as the primary anthelmintic agent for treating tapeworm infections due to its specific mechanism of action against these parasites. Unlike other anthelmintics, praziquantel works by causing severe spasms and paralysis of the tapeworm's muscles. It increases the permeability of the cell membranes of the tapeworm to calcium ions, which results in the muscle contractions and paralysis that enable the host's immune system to eliminate the parasite more effectively.

This agent is particularly effective against a variety of cestodes (tapeworms) as well as other flatworms, making it a versatile choice in the treatment of infections caused by these organisms. Its water-soluble form allows for better absorption, and it has been shown to have minimal side effects, contributing to its widespread use in clinical practice for tapeworm infections.

Other options, while they do have pharmacologic uses, are not primarily indicated for the treatment of tapeworms. For example, albendazole is more commonly used against nematodes and some cestodes but is not as specific or effective for tapeworms compared to praziquantel. Piperazine is primarily used for roundworm infections, and levamisole is actually targeted