. Mechanism & Class Class: Cardioselective β₁-blocker Action: Blocks cardiac β₁-receptors → ↓ heart rate, ↓ contractility, ↓ renin release Reduces cardiac output → lowers BP Key Limitation: Lacks vasodilatory effects (unlike carvedilol/nebivolol) Minimal CNS penetration (vs. propranolol) 2. FDA-Approved Uses Indication Dosage Range Notes Hypertension 25-100 mg daily Not first-line per guidelines Angina Pectoris 50-200 mg daily Reduces attack frequency Arrhythmias 50-100 mg daily SVT/Ventricular control 3. Dosing Protocol Starting: 25-50 mg once daily Titration: ↑ by 25 mg weekly (max 100 mg/day) Take: On empty stomach (food ↓ absorption 20%) Renal Adjustment: CrCl (mL/min) Dose Adjustment 15-35 Max 50 mg/day <15 Max 25 mg/day or avoid 4. Black Box Warnings & Contraindications Risk Critical Considerations Abrupt Withdrawal ↑ Angina/MI risk – taper over 1-2 weeks Heart Failure Decompensation Avoid in acute HF or HFrEF...
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