Which dietary consideration should be taken by a client on phenelzine, a MAOI, to prevent hypertensive crisis?

Choice A reason: Phenelzine is a monoamine oxidase inhibitor (MAOI) that prevents the breakdown of tyramine. Consuming foods high in tyramine, such as aged cheeses, cured meats, and fermented products, can lead to a massive release of norepinephrine, resulting in a life-threatening hypertensive crisis characterized by severe headache and elevated blood pressure. Choice B reason: While vitamin D is essential for bone health and mood regulation, it has no direct interaction with MAOIs that would influence the risk of a hypertensive crisis. Vitamin D supplementation is independent of the specific dietary restrictions required for safe monoamine oxidase inhibitor pharmacological therapy. Choice C reason: Reducing overall protein intake is not necessary for clients on MAOIs. The restriction is specific to the tyramine content, which is a byproduct of protein breakdown in aged or fermented foods. Fresh proteins, such as unaged meats and poultry, are generally safe and do not pose a hypertensive risk. Choice D reason: Increasing dietary fiber is a general health recommendation for gastrointestinal motility, but it does not prevent the pharmacological interaction between MAOIs and tyramine. The nursing priority for phenelzine education must remain focused on the strict avoidance of high-tyramine foods to ensure patient safety.