To evaluate the effectiveness of a male client's new prescription for ezetimibe, which action should the clinic nurse implement?

A. Remind the client to keep his appointments to have his cholesterol level checked: Ezetimibe works by reducing absorption of cholesterol in the intestines, which lowers serum lipid levels. The most direct way to evaluate effectiveness is through laboratory testing of cholesterol levels at scheduled follow-up appointments. B. Assess the elasticity of the client's skin at the next scheduled clinic appointment: Skin elasticity is not affected by cholesterol-lowering therapy and does not provide meaningful information about the effectiveness of ezetimibe. C. Teach the client to weigh himself weekly and keep a log of the measurements: Weight monitoring is more relevant for managing conditions like heart failure or obesity. Ezetimibe’s primary effect is on lipid levels, not weight change. D. Encourage the client to keep a diary of his food intake until his next visit to the clinic: While dietary tracking supports lifestyle management, it does not directly measure the pharmacologic effectiveness of ezetimibe. Laboratory results remain the standard for evaluation.