內科藥物機轉和衝突

 【Interaction: Warfarin & Antibiotics】

1. Mechanism: Displacement from albumin binding or inhibition of Cytochrome P450 (CYP) enzymes.

2. High-Risk Agents: Quinolones, Macrolides, and Sulfonamides (Baktar).

3. Clinical Impact: Elevated INR, increased risk of spontaneous bleeding (ICH, GI bleeding).

4. NP Intervention: Monitor INR frequently, consider prophylactic dose reduction, and switch to safer antibiotic options if possible.

【Interaction: Diuretics & Digoxin/Anti-arrhythmics】

1. Mechanism: Hypokalemia (induced by Loop diuretics like Lasix) sensitizes the myocardium to Digoxin.

2. Clinical Impact: Digoxin toxicity (N/V, blurred vision, life-threatening arrhythmias).

3. QT Prolongation: Combined use of Macrolides and certain antipsychotics (e.g., Haloperidol) increases risk of Torsades de Pointes (TdP).

4. NP Intervention: Monitor Serum K+ and Mg2+ levels; perform baseline and follow-up ECG to measure QTc intervals.

【Interaction: Statins & CYP Inhibitors】

1. Mechanism: Inhibition of CYP3A4 leads to elevated Statin serum levels.

2. Culprits: Grapefruit juice, Amiodarone, Diltiazem, and some Antifungals.

3. Clinical Impact: Rhabdomyolysis (muscle pain, tea-colored urine, acute renal failure).

4. NP Intervention: Educate patient on diet; assess CPK levels if muscle pain is reported.