1. Fatigue and low energy
Fatigue is one of the most commonly reported side effects when starting metoprolol. This medication slows the heart rate and reduces the workload on your heart, which can initially leave you feeling less energetic than usual. This effect is due to the decreased cardiac output and the body’s adjustment to the new heart rate.
In practice, you might notice that routine activities like walking, climbing stairs, or household chores require more effort or that you feel tired earlier in the day. While this is often temporary, lasting a few weeks as your body adapts, persistent or worsening fatigue should prompt discussion with your healthcare provider.
When to be concerned
If fatigue interferes with your ability to perform basic daily tasks such as cooking, walking, or personal care, it is important to inform your doctor. They can evaluate whether a dosage adjustment or alternative medication might be necessary.
2. Dizziness when standing
Dizziness upon standing, also known as orthostatic hypotension, occurs when blood pressure drops suddenly as you change position from sitting or lying down to standing. Metoprolol can contribute to this by lowering your blood pressure and affecting the body’s normal reflexes that stabilize blood flow.
This symptom may manifest as lightheadedness, a sensation that the room is spinning, or even fainting in severe cases. Dehydration and certain other medications can exacerbate this effect.
Practical steps to reduce dizziness
- Sit for a few moments before standing
- Stand up slowly and steadily
- Ensure adequate hydration throughout the day
- Discuss any falls or frequent dizziness with your healthcare provider promptly
These adjustments help your body accommodate the blood pressure changes and reduce the risk of falls.





