The therapeutic range for Dilantin is __________. It is essential for effective seizure control.

A. Chronic kidney disease: While kidney disease requires careful monitoring of anticoagulants, it is not an absolute contraindication for warfarin. Dose adjustments and frequent INR monitoring can allow safe use in many patients with renal impairment.

B. Hypertension: Hypertension is common in patients taking warfarin but is not a contraindication. Careful blood pressure control is important to reduce the risk of hemorrhagic complications, but warfarin can still be used safely.

C. Diabetes mellitus: Diabetes does not preclude warfarin therapy. Patients with diabetes may require monitoring for cardiovascular risk, but anticoagulation is not contraindicated solely due to diabetes.

D. Active bleeding disorders: Warfarin inhibits clotting and increases bleeding risk, making it contraindicated in patients with active bleeding. Administering warfarin in this context could lead to life-threatening hemorrhage and must be avoided.

A. Nausea: Nausea can occur with many medications but is not a primary concern with furosemide therapy. It does not reflect the major physiologic changes caused by the drug, such as fluid or electrolyte loss. Monitoring only for nausea may overlook more serious effects related to volume depletion.

B. Increased urinary output: This effect is expected because furosemide promotes diuresis by inhibiting sodium and chloride reabsorption. Higher urine output indicates that the medication is working rather than causing harm.

C. Dizziness Lightheadedness: Furosemide can cause significant fluid loss and lower blood pressure, leading to dizziness or lightheadedness from reduced circulating volume. These symptoms may indicate hypotension or dehydration, requiring prompt assessment. Monitoring for these effects helps prevent falls and cardiovascular instability.

D. Gastric upset: Mild gastric irritation may occur, but it is not a key adverse effect associated with furosemide. Instead, the drug’s main risks involve electrolyte imbalances and volume depletion. Focusing on gastric discomfort would not detect potentially serious complications.