Dizziness, especially when standing up from sitting or lying down (called orthostatic hypotension), is common. This happens because metoprolol can lower blood pressure more than expected in some positions.
You might feel faint or unsteady for a moment. Mayo Clinic lists this among effects to watch for, particularly in the early stages of treatment.
To reduce the risk, rise slowly — sit on the edge of the bed for a few seconds before standing. Staying hydrated also supports better blood pressure stability.
3. Slow Heart Rate (Bradycardia)
Metoprolol intentionally slows the heart rate, but sometimes it slows more than intended. This can lead to symptoms like feeling weak, short of breath, or unusually tired.
In clinical information from MedlinePlus and Cleveland Clinic, a very slow heartbeat is noted as something to report to your doctor. Your provider may check your pulse regularly or adjust your dose if needed.
4. Low Blood Pressure (Hypotension)
Along with a slower heart rate, blood pressure can drop, causing lightheadedness or even fainting in some cases. This is more likely when you first start the medication or after a dose increase.
Symptoms include blurred vision or feeling like you’re about to pass out. Reliable sources such as WebMD highlight low blood pressure as a key effect to monitor.
