Propranolol and Depression: Mechanism and Evidence

Mechanism of Action and CNS Effects

• Theoretical concerns exist about adverse effects of propranolol on brain development, as studies in adults have revealed impairments in short- and long-term memory, psychomotor function, and mood 1

Evidence for Depression Risk

• Sleep disturbances, including sleep disorders, agitation during the night, nightmares, and night terrors are documented side effects occurring in 2-18.5% of patients treated with propranolol 1

Clinical Considerations

• Propranolol is used therapeutically for various conditions including stage fright, where it blocks peripheral effects of adrenaline to reduce symptoms like rapid heart rate and tremors 2
• Common side effects of propranolol include bradycardia, hypotension, fatigue, cold extremities, and sleep disturbances 2

Risk Mitigation

• Be aware that abrupt discontinuation of propranolol after regular use can lead to rebound symptoms 2
• Exercise caution when prescribing propranolol to patients with diabetes as it may mask symptoms of hypoglycemia 3, 2