Metoprolol
Generic Name: Metoprolol Succinate / Metoprolol Tartrate
Uses & Medical Indications
Treatment of hypertension, angina pectoris, and heart failure
Hypertension, Angina, Heart Failure, Myocardial Infarction
Work Mechanism & Pharmacology
Patient Overview of Work Mechanism
Metoprolol shields the heart from excess stress hormones like adrenaline, lowering your pulse, reducing blood pressure, and protecting the heart muscle.
Clinical Mechanism of Action (MoA)
Cardioselective beta-1 adrenergic receptor antagonist. Competitively inhibits sympathetic catecholamine (epinephrine and norepinephrine) binding to myocardial beta-1 receptors, decreasing heart rate, myocardial contractility, and cardiac output while suppressing renin release from renal juxtaglomerular cells.
Dosage & Administration Guidelines
50-100 mg daily in single or divided doses
1-2 mg/kg/day orally (Off-label)
Start at lower end of dosing range
400 mg/day
No adjustment necessary
Consider dose reduction in severe hepatic impairment
Side Effects & Safety Warnings
Dizziness, fatigue, depression, bradycardia, diarrhea
Heart block, bronchospasm, heart failure exacerbation
Severe bradycardia, heart block greater than first degree, cardiogenic shock
Avoid abrupt cessation (taper over 1-2 weeks). May mask hypoglycemia symptoms.
Interactions (Drugs, Food & Alcohol)
Calcium channel blockers (diltiazem, verapamil), digoxin, amiodarone
Take with or immediately following meals
May increase hypotensive effects
Pregnancy & Breastfeeding Safety
Use if benefits outweigh risks; monitor neonate for bradycardia and hypoglycemia
Excreted in breast milk; observe infant for bradycardia
Patient Counseling & Practical Advice
Do not stop abruptly. Arise slowly to avoid dizziness. Take with food.
Take as soon as remembered; skip if next dose is within 8 hours (ER) or 4 hours (IR)
Blood pressure, heart rate, ECG
Frequently Asked Questions
When to Seek Urgent Medical Attention
Severe dizziness, fainting, crushing chest pain, extreme shortness of breath with pink frothy sputum.
Content for Metoprolol was synthesized from standardized public health monographs, official pharmacopoeias, and health authorities:
- AHA / ACC / Heart Failure Society of America — Guideline for the Management of Heart Failure
The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.