II. Mechanism
- See Beta Adrenergic ReceptorAntagonist
- Selective Beta Antagonist that primarily inhibits B1 activity by blocking B1 Receptors
- Reduces Myocardial Contractility, Blood Pressure, myocardial oxygen demand
- Also Antiarrhythmic and slows ventricular response in Atrial Fibrillation
- Contrast with non-selective Beta Blockers (e.g. Propranolol)
- Non-selective Beta Blockers also act at B2 Receptors (bronchoconstriction) and B3 Receptors (block lipolysis)
III. Adverse Effects
- See Beta Blocker
IV. Drug Interactions
- See Beta Blocker
V. Dosing
- Most cardioselective of Beta Blockers
- Start: 2.5 to 5 mg orally daily
- Maximum: 20 mg/day