Ivermectin is an antiparasitic medication used to treat infections like strongyloidiasis, onchocerciasis, and certain ectoparasites such as scabies and head lice in humans and animals. It works by binding to glutamate-gated chloride channels in parasites, causing paralysis and death. Standard human dosing and indications vary by condition; medical supervision is essential due to potential drug interactions and safety considerations, especially in specific populations.