A 43-year-old man presents to the psychiatric-mental health nurse practitioner complaining of depressed mood and inability to sleep for the past 3 weeks. The PMHNP diagnoses major depressive disorder. The patient states that in the past, when he had similar episodes, he was placed on a monoamine oxidase inhibitor (MAOI) that proved effective. The PMHNP agrees to use an MAOI because it is the patient's request and it has been successful in the past. Which of the following foods must be completely avoided by this patient while on this medication?

Choice A reason: Chocolate contains small amounts of tyramine and phenylethylamine, which may pose a mild risk when consumed in large quantities while on MAOIs. However, it is not considered a high-risk food requiring complete avoidance. Moderation is generally advised, but it is not strictly prohibited. Choice B reason: Coffee does not contain significant levels of tyramine and is not contraindicated with MAOIs. While caffeine may exacerbate anxiety or insomnia, it does not interact dangerously with MAOIs in the same way tyramine-rich foods do. Choice C reason: Cheddar cheese is an aged cheese and contains high levels of tyramine, which can lead to hypertensive crisis when consumed with MAOIs. Tyramine is normally broken down by monoamine oxidase, but when this enzyme is inhibited, tyramine accumulates and can cause dangerous spikes in blood pressure. Therefore, aged cheeses like cheddar must be strictly avoided. Choice D reason: Potato chips are not fermented or aged and do not contain significant tyramine levels. They are not contraindicated with MAOIs, although excessive salt or fat intake may be discouraged for general health reasons.