A nurse is reinforcing teaching with a client who has a prescription for simvastatin. Which of the following instructions should the nurse provide?

A. Simvastatin is a HMG-CoA reductase inhibitor that works best when taken in the evening, because cholesterol synthesis in the liver peaks at night. Taking it at this time enhances the medication’s effectiveness in lowering LDL cholesterol. B. Taking an antacid with simvastatin is unnecessary and does not improve absorption or efficacy. Antacids may even interfere with the medication’s absorption if taken simultaneously. C. Grapefruit juice can increase simvastatin blood levels, raising the risk of muscle toxicity (myopathy or rhabdomyolysis). Clients should be advised to avoid grapefruit and grapefruit juice. D. Simvastatin can be taken with or without food; a meal or snack is not required to enhance absorption. However, adherence to evening dosing is more important for therapeutic effect.