What is the primary action of anthelmintic agents?

The primary action of anthelmintic agents is to eliminate helminths, which are parasitic worms such as roundworms, tapeworms, and flukes that can inhabit the intestinal tract or other parts of the body. These medications work by targeting specific physiological processes in the worms, leading to their paralysis or death, and facilitating their expulsion from the host's body. This is crucial in treating infections caused by these parasites, which can lead to significant morbidity, malnutrition, and other health complications in affected individuals.

The other options do not accurately reflect the main function of anthelmintic agents. Enhancing nutrient absorption, improving digestive health, and restoring gut flora may be beneficial aspects of overall health management, but they are not the primary actions of anthelmintic drugs. Rather, these agents are specifically designed for the removal of helminthic infections, making their primary action distinct and critical in managing such parasitic diseases.