Parasitic infections remain a significant public health challenge, particularly in tropical and subtropical regions like Nigeria. These infections are caused by organisms that live on or inside a host organism and get their food from or at the expense of that host. Antiparasitic drugs are pharmaceutical agents designed to kill or inhibit the growth of these parasites, which broadly include protozoa, helminths, and ectoparasites. Unlike bacteria, parasites are eukaryotic organisms, meaning their cellular structure closely resembles human cells. This biochemical similarity makes the development of selective toxicity challenging, as drugs that harm the parasite can also cause adverse effects in the human host.
Effective antiparasitic therapy relies on accurate identification of the causative organism and an understanding of its life cycle. Treatment goals include eliminating the parasite, relieving clinical symptoms, and preventing transmission within the community. Nurses play a crucial role in recognizing clinical manifestations of parasitic infestations, supporting diagnostic evaluations, and ensuring treatment compliance.
Helminths are parasitic worms that infect various organs in the human body, commonly categorized into nematodes (roundworms), cestodes (tapeworms), and trematodes (flukes). Anthelmintics are medications used to expel or destroy these infesting worms.
Malaria is a life-threatening vector-borne disease caused by Plasmodium species and transmitted by infected female Anopheles mosquitoes. Management requires prompt administration of effective antimalarial drugs tailored to the species and severity of infection.
Protozoal infections affect millions globally, often transmitted through contaminated food and water or sexual contact. Treatment often involves nitroimidazole derivatives and other targeted anti-infectives.
Ectoparasites reside on the external surface of the human body, specifically infesting the skin and hair. The two most common infestations managed in clinical practice are scabies (caused by Sarcoptes scabiei mites) and pediculosis (lice infestation).
Because antiparasitic agents target complex metabolic pathways, patients frequently experience adverse drug reactions. Gastrointestinal upset—including nausea, abdominal cramps, and diarrhea—is nearly universal across this drug class due to local irritation and the dying burden of parasites in the gut.
Central nervous system effects such as dizziness, headache, and peripheral neuropathy can occur with prolonged nitroimidazole use or high-dose antimalarials. Hepatotoxicity and bone marrow suppression are serious risks associated with prolonged benzimidazole courses, requiring baseline and periodic liver function and complete blood count monitoring. Nurses must monitor for signs of hypersensitivity, jaundice, or unusual bleeding, and educate patients on completing the full course of therapy despite mild side effects.