A client who is receiving zidovudine reports the appearance of pinpoint, red, round spots on the skin. Which result should the nurse report to the healthcare provider?

A. Electromyography: Electromyography assesses electrical activity in muscles and is used to diagnose neuromuscular disorders. It is not relevant to evaluating bleeding tendencies or pinpoint skin spots, which suggest a hematologic issue like thrombocytopenia. B. Skin biopsy: A skin biopsy might help diagnose dermatologic conditions, but it is invasive and not the initial step when systemic drug side effects like petechiae are suspected. The presence of red spots suggests a possible blood disorder requiring laboratory confirmation first. C. Complete blood count: A CBC is essential to evaluate for thrombocytopenia, a known adverse effect of zidovudine. Pinpoint red spots, or petechiae, are often linked to low platelet counts, which require prompt detection and management to prevent serious complications. D. Allergy test: Allergy testing identifies hypersensitivity reactions, typically associated with rashes or itching. Petechiae are not commonly caused by allergic reactions but are more indicative of blood abnormalities, making this test less immediately relevant.