A nurse is teaching a client who is taking atorvastatin daily. Which statement by the client indicates understanding of the teaching?

A. "Muscle pain is normal when taking the medication.": Muscle pain may indicate a serious adverse effect such as myopathy or rhabdomyolysis. While mild discomfort can occur, persistent or severe muscle pain should always be reported to the healthcare provider. B. "I will avoid drinking grapefruit juice.": Grapefruit juice inhibits CYP3A4, the enzyme that metabolizes atorvastatin. This can lead to increased drug levels in the blood and a heightened risk of side effects like liver toxicity and muscle damage. C. "It is not necessary to have routine lab tests done.": Routine monitoring of liver enzymes and lipid levels is essential while taking atorvastatin. These labs help assess both effectiveness and safety, especially for detecting early signs of liver dysfunction or muscle injury. D. "I should expect my urine to turn coca cola color.": Dark-colored urine could signal rhabdomyolysis, a medical emergency linked to muscle breakdown. This is not an expected side effect and should prompt immediate evaluation, not acceptance as normal.