The nurse is preparing to administer morning medications to a patient who has been newly diagnosed with tuberculosis. The patient asks, "Why do I have to take so many different drugs?" Which response by the nurse is correct?

Choice A reason: Hydroxychloroquine is not used for intestinal tapeworms, which are treated with antiparasitic drugs like praziquantel. Hydroxychloroquine inhibits lysosomal function and is used for malaria or autoimmune diseases like lupus, not helminth infections, which require drugs targeting parasitic metabolism.

Choice B reason: Lyme disease, caused by Borrelia burgdorferi, is treated with antibiotics like doxycycline, not hydroxychloroquine. Hydroxychloroquine’s antimalarial and immunomodulatory effects are irrelevant to bacterial infections like Lyme disease, which requires antimicrobial therapy to eliminate the spirochete.

Choice C reason: Hydroxychloroquine is commonly used for systemic lupus erythematosus (SLE). It modulates the immune system by inhibiting toll-like receptor signaling, reducing inflammation and autoantibody production. This makes it effective for managing SLE symptoms like joint pain or rashes, even in non-travelers, as it is not exclusively an antimalarial.

Choice D reason: Toxoplasmosis, caused by Toxoplasma gondii, is treated with pyrimethamine and sulfadiazine, not hydroxychloroquine. Hydroxychloroquine’s mechanism does not target protozoal infections like toxoplasmosis, which require drugs that inhibit folate synthesis in the parasite, making this an incorrect indication.

Choice A reason: Drowsiness is not a common adverse effect of chloroquine, an antimalarial drug. Chloroquine inhibits heme polymerization in Plasmodium, with side effects like visual disturbances or dizziness. Drowsiness is more associated with antihistamines or CNS depressants, not chloroquine’s mechanism or pharmacokinetic profile.

Choice B reason: Constipation is not a typical side effect of chloroquine. Its primary adverse effects include gastrointestinal upset, visual toxicity, or neurological symptoms like dizziness. Chloroquine’s action on parasitic metabolism does not significantly affect gastrointestinal motility, making constipation an unlikely reaction to report.

Choice C reason: Dizziness is a known adverse effect of chloroquine, potentially due to its effects on the central nervous system or ototoxicity. Patients should report dizziness, as it may indicate toxicity or neurological involvement, requiring dose adjustment or monitoring to ensure safe antimalarial or anti-inflammatory therapy.

Choice D reason: Insomnia is not a primary adverse effect of chloroquine. While neurological effects like headache or dizziness may occur, insomnia is less common. Chloroquine’s toxicity profile focuses on visual, cardiac, or neurological symptoms, and insomnia is not typically reported, making this less critical to monitor.