Metoprolol is a commonly prescribed beta blocker used to treat several cardiovascular conditions, including high blood pressure, angina, certain abnormal heart rhythms, heart failure, and problems that may occur after a heart attack.
For many people, metoprolol is effective and well tolerated. Like every medication, however, it can cause side effects. Some are relatively common and may improve as the body adjusts, while others are less common but deserve prompt medical attention.
The risk of side effects depends on the dose, the reason metoprolol is being used, age, kidney and liver function, other health conditions, and interactions with other medicines.
One of the most important safety points is this: do not suddenly stop metoprolol without medical advice. Abrupt withdrawal can cause the heart rate and blood pressure to rise and may worsen angina or other cardiovascular problems in susceptible people.
Here are 10 important effects to recognize, along with the symptoms that should prompt a conversation with your doctor or pharmacist.
What Is Metoprolol?
Metoprolol belongs to a class of medicines called beta blockers.
It primarily blocks beta-1 adrenergic receptors in the heart. This reduces the effects of adrenaline and related stress hormones on the cardiovascular system.
As a result, metoprolol can:
Slow the heart rate
Reduce the force of heart contractions
Lower blood pressure
Reduce the heart’s oxygen demand
Help control certain abnormal heart rhythms
These effects explain both why the medicine is useful and why some of its side effects occur.
Metoprolol Tartrate and Metoprolol Succinate
Metoprolol is available in different formulations.
Metoprolol tartrate is generally an immediate-release form, while metoprolol succinate is an extended-release formulation.
They are not always prescribed in exactly the same way, and patients should not switch formulations or change dosing schedules without professional guidance.
1. Tiredness and Low Energy
Fatigue is one of the more commonly reported effects of beta blockers.
Because metoprolol slows the heart and reduces its workload, some people notice a temporary reduction in energy, particularly when starting treatment or after a dose increase.
Symptoms can include:
Unusual tiredness
Reduced exercise tolerance
Feeling weaker than usual
Daytime sleepiness
Sluggishness
For some patients, fatigue improves over the first days or weeks as the body adapts.
Persistent or severe exhaustion should be discussed with the prescribing clinician because other causes may also be involved, including anemia, thyroid disease, sleep disorders, low blood pressure, heart problems, depression, or interactions with other medicines.
Why Does Metoprolol Make Some People Feel Tired?
