A nurse is providing information for a client who has a new prescription for simvastatin. For which of the following should the nurse instruct the client to monitor and report to the provider?

A) Edema: While edema can occur in some patients, it is not a common or serious side effect of simvastatin. Clients should monitor for any unusual swelling, but it is not the primary concern associated with this medication. B) Weight loss: Weight loss is not typically associated with simvastatin use. Clients should be aware of their weight but reporting weight loss alone is not usually necessary unless it is significant or accompanied by other concerning symptoms. C) Muscle weakness: Simvastatin can lead to muscle-related side effects, including myopathy and rhabdomyolysis, which can present as muscle weakness. It is critical for clients to monitor for any unexplained muscle pain, tenderness, or weakness and report these symptoms to the provider, as early intervention can prevent serious complications. D) Fever: Fever is not a typical side effect of simvastatin. While clients should report any signs of infection or unusual symptoms, fever alone is not specifically linked to the use of this medication and does not warrant immediate concern related to simvastatin therapy.