What is a common side effect of beta-blockers that patients should be aware of?

Fatigue is a common side effect of beta-blockers that patients should be aware of because these medications work by blocking the effects of adrenaline on the beta-adrenergic receptors in the heart and vascular system. This action reduces heart rate and contractility, leading to lower cardiac output and, consequently, a decrease in energy levels for some patients. As the body adjusts to changes in heart rate and blood flow, feelings of tiredness or lethargy may occur. It's essential for patients to know this potential side effect so they can monitor their symptoms and discuss them with their healthcare provider if necessary.

In contrast, weight gain can occur but is less commonly associated with beta-blockers compared to fatigue. Increased blood pressure is not a typical side effect of these medications, as they are primarily used to lower blood pressure. Excessive sweating is not commonly linked with beta-blocker therapy either; patients generally experience a decrease in sweating with use of these drugs. Identifying fatigue as a notable side effect helps patients manage their expectations about their treatment and maintain communication with their healthcare providers.