A nurse is providing discharge teaching to a client with a new prescription for phenelzine. The nurse should instruct the client to avoid which of the following foods when taking this medication?
A.
Frozen peas.
B.
Cottage cheese.
C.
Shellfish.
D.
Salami.
The Correct Answer and Explanation is:
The correct answer is D. Salami.
Phenelzine is a monoamine oxidase inhibitor (MAOI), a class of antidepressant medications. MAOIs work by inhibiting the enzyme monoamine oxidase, which breaks down neurotransmitters like serotonin, norepinephrine, and dopamine. By inhibiting this enzyme, phenelzine increases the levels of these neurotransmitters, which helps alleviate symptoms of depression. However, one of the critical concerns with MAOIs like phenelzine is their interaction with certain foods, particularly those high in tyramine.
Tyramine is an amino acid that helps regulate blood pressure. Normally, monoamine oxidase breaks down excess tyramine in the body. However, when taking an MAOI like phenelzine, this breakdown is inhibited, allowing tyramine to accumulate. Excess tyramine can cause a dangerous spike in blood pressure, leading to a hypertensive crisis, which can be life-threatening. Symptoms of a hypertensive crisis include severe headache, chest pain, rapid heartbeat, and nausea.
Foods high in tyramine that should be avoided while taking phenelzine include:
- Aged cheeses (e.g., cheddar, blue cheese, or gouda)
- Aged or cured meats (e.g., salami, pepperoni, or bologna)
- Fermented or pickled foods (e.g., sauerkraut, kimchi)
- Soy products (e.g., tofu, soy sauce)
- Alcohol, particularly beer and red wine
Among the given options, salami is a cured meat that contains high levels of tyramine due to the fermentation and aging process. Therefore, clients on phenelzine should avoid salami to prevent a hypertensive crisis.
The other options (frozen peas, cottage cheese, and shellfish) are low in tyramine and generally considered safe to consume while taking MAOIs. Cottage cheese, unlike aged cheeses, does not undergo the fermentation process that significantly increases tyramine levels. Frozen peas and shellfish do not pose a risk in terms of tyramine content.