Can metoprolol cause palpitations

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Can Metoprolol Cause Palpitations?

Introduction to Metoprolol and Its Uses

Metoprolol is a beta-blocker commonly prescribed to manage various cardiovascular conditions, including hypertension, angina, and arrhythmias. It works by blocking beta-adrenergic receptors, which helps to slow the heart rate and reduce blood pressure.

Metoprolol and Palpitations: Clinical Evidence

Electrophysiological Effects of Metoprolol

Research has shown that metoprolol has significant effects on cardiac electrophysiology. In a study involving patients with paroxysmal palpitations, metoprolol was found to increase the sinus node recovery time and atrio-His conduction intervals significantly . These changes suggest that metoprolol can alter the heart's electrical activity, which might influence the occurrence of palpitations.

Metoprolol in Combination Therapies

In a study examining the combination of metoprolol with sibutramine in obese patients, it was observed that the addition of metoprolol reduced the frequency and severity of palpitations compared to sibutramine alone . This indicates that metoprolol may help mitigate palpitations when used in combination with other medications that have a higher risk of causing this symptom.

Case Reports and Side Effects

There are case reports that highlight the occurrence of palpitations in patients taking metoprolol. For instance, a patient developed palpitations after starting metoprolol, which resolved upon discontinuation of the drug . Additionally, abrupt withdrawal of metoprolol in a study led to symptoms including palpitations, which were alleviated upon resumption of the medication or gradually subsided over several days .

Conclusion

While metoprolol is generally effective in managing heart rate and reducing blood pressure, it can cause palpitations in some cases, particularly if the medication is abruptly discontinued or if the patient has a specific sensitivity to the drug. However, in combination therapies, metoprolol may reduce the incidence of palpitations caused by other medications. Patients experiencing palpitations while on metoprolol should consult their healthcare provider to adjust their treatment plan accordingly.

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Most relevant research papers on this topic

The acute electrophysiological effects of intravenous metoprolol

Intravenous metoprolol increases sinus node recovery time and atrio-His conduction intervals, but does not affect the His-ventricular interval, AERP, or VERP.

1982·

10citations

·A. Camm et al.

Clinical Cardiology·

DOI

Effect of low-dose metoprolol in combination with sibutramine therapy in normotensive obese patients: a randomized controlled study

Low-dose metoprolol combined with sibutramine therapy improves patient compliance and reduces side effects without affecting drug efficacy or metabolic parameters.

RCTVery Rigorous Journal

2004·

18citations

·H. O. Ersoz et al.

International Journal of Obesity·

DOI

Polypharmacy in the Elderly-When Good Drugs Lead to Bad Outcomes: A Teachable Moment.

Polypharmacy in the elderly can lead to confusion, burdensome, and expensive medication regimens, potentially leading to adverse outcomes.

Case ReportRigorous Journal

2017·

33citations

·C. Carroll et al.

JAMA internal medicine·

DOI

Metoprolol-Induced Lichenoid Dermatitis

Metoprolol-induced lichenoid dermatitis is a rare but potentially serious skin reaction caused by beta-blockers, typically disappearing within days to months after discontinuing the medication.

Case Report

2011·

5citations

·Douglas L. Nguyen et al.

Journal of General Internal Medicine·

DOI

Comparison of metoprolol and hydrochlorothiazide as antihypertensive agents

Both metoprolol and hydrochlorothiazide effectively reduce blood pressure in mild hypertension patients, with few side effects and potential risks.

1976·

4citations

·O. Lederballe Pedersen

European Journal of Clinical Pharmacology·

DOI

Comparison of metoprolol as hydrochlorothiazide and antihypertensive agents.

Metoprolol and hydrochlorothiazide effectively reduce blood pressure in mild hypertension patients, with few side effects and potential risks.

1976·

2citations

·O. L. Pedersen

European journal of clinical pharmacology

[The effect of OROS metoprolol in mild and moderately severe essential hypertension].

Metoprolol OROS, administered once per day, is an effective, safe, and well-tolerated treatment for mild to moderately severe essential hypertension.

1990·

0citations

·J. Hradec et al.

Casopis lekaru ceskych

Metoprolol in acute myocardial infarction (MIAMI). A randomised placebo-controlled international trial. The MIAMI Trial Research Group.

Metoprolol may reduce mortality in high-risk acute myocardial infarction patients, but its effect on overall mortality and morbidity remains unclear.

RCTLarge Human TrialHighly Cited

1985·

566citations

·J. Herlitz et al.

European heart journal

Effect of metoprolol CR/XL in chronic heart failure: Metoprolol CR/XL Randomised Intervention Trial in Congestive Heart Failure (MERIT-HF)

Metoprolol CR/XL once daily in addition to standard therapy improved survival in chronic heart failure patients with decreased ejection fraction and symptoms, and was well-tolerated.

RCTLarge Human TrialHighly Cited

1999·

5065citations

·A. Hjalmarson et al.

Lancet·

DOI

Effect of metoprolol on myocardial function and energetics in patients with nonischemic dilated cardiomyopathy: a randomized, double-blind, placebo-controlled study.

Metoprolol treatment improves myocardial performance and energetics, and favorably alters substrate utilization in patients with nonischemic dilated cardiomyopathy.

RCTHighly Cited

1994·

321citations

·Eric J. Eichhorn et al.

Journal of the American College of Cardiology·

DOI

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