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.
