What reaction is a major risk if a patient on MAO inhibitors consumes tyramine-containing foods?

• A. Hypertensive crisis
• B. Sedative overdose
• C. Hypoglycemia
• D. Serotonin syndrome

Answer: (A)

A hypertensive crisis is the major risk. When someone is on MAO inhibitors, dietary tyramine isn’t broken down effectively. Tyramine can enter sympathetic neurons and cause a large release of norepinephrine from storage vesicles. With the enzyme blocked, this surge is amplified, leading to a dangerous spike in blood pressure—potentially causing severe headaches, chest pain, stroke, or other serious issues. That’s why tyramine-rich foods like aged cheese, cured meats, and certain fermented foods are avoided on MAO inhibitors. Sedative overdose and hypoglycemia don’t fit this mechanism, and serotonin syndrome is typically linked to combining MAO inhibitors with other serotonergic drugs rather than to tyramine-containing foods alone.