A nurse is preparing to start chloroquine for malaria prevention. Which client history finding should be reported to the provider before giving the medication?

A. Travel to a non-endemic area does not pose a safety concern for chloroquine therapy. Malaria prophylaxis is guided by anticipated travel to malaria-endemic regions. Prior travel to areas without malaria does not influence the need for or the safety of chloroquine prophylaxis. B. Ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID), does not have significant interactions with chloroquine at standard doses. Routine use of ibuprofen for headaches does not require withholding chloroquine, though the nurse should monitor for general medication side effects. C. Chloroquine is partially excreted by the kidneys, and clients with renal impairment are at increased risk for drug accumulation and toxicity. Accumulation can lead to retinal toxicity, gastrointestinal upset, neuromuscular effects, and cardiac conduction abnormalities, including QT interval prolongation. Reporting a history of renal impairment allows the healthcare provider to adjust the dose, choose an alternative antimalarial, or implement closer monitoring to prevent adverse effects. D. A history of mild nausea with prior antibiotic use is not a contraindication for chloroquine therapy. While gastrointestinal side effects such as nausea may occur with chloroquine, mild previous reactions to other medications do not necessitate provider notification before starting the drug.