A nurse is reviewing the laboratory results of a client who has atrial fibrillation and a prescription for warfarin. After informing the provider that the INR is 2.5, the nurse should expect which of the following prescriptions?

The correct answer is D: Administer the current dose of the medication. An INR of 2.5 is within the therapeutic range for a client on warfarin therapy for atrial fibrillation. This INR indicates that the client's blood is adequately anticoagulated to prevent clot formation without increasing the risk of bleeding. Withholding or decreasing the medication may lead to an inadequate anticoagulant effect, putting the client at risk for thromboembolic events. Increasing the dose may elevate the INR above the therapeutic range, increasing the risk of bleeding. Administering the current dose maintains the INR within the target range, ensuring the client's safety and efficacy of treatment.