What dietary restrictions are associated with Monoamine Oxidase Inhibitors (MAOIs) to prevent hypertensive crisis?

• A. Avoid caffeine-containing beverages.
• B. Only avoid alcohol.
• C. Increase tyramine-rich foods.
• D. Avoid tyramine-rich foods and certain OTC medications.

Answer: (D)

When MAO inhibitors are used, tyramine in foods that would normally be broken down by monoamine oxidase can enter the bloodstream in higher amounts. Tyramine acts like a natural releasing agent for norepinephrine, so it can trigger a large surge of this neurotransmitter. That surge causes blood vessels to constrict and a rapid, dangerous rise in blood pressure—a hypertensive crisis. To prevent this, the restricting approach is twofold: avoid foods high in tyramine and steer clear of certain over-the-counter medications that can interact with MAOIs and also promote norepinephrine release or other dangerous effects. So, you avoid tyramine-rich foods and avoid OTC products that contain decongestants or stimulants (and other interacting agents), which is why this option is the best fit.