A client on selegiline 10 mg/day for Parkinson disease asks … | MyMerci
Medical EmergenciesPA
Question
A client on selegiline 10 mg/day for Parkinson disease asks the nurse which foods to avoid. Which response is most accurate for selegiline at this dose?
1Eat a high-protein diet for optimal selegiline effect
2Avoid all green vegetables to prevent interactions
3Strict tyramine-free diet is mandatory at all doses
4At doses up to 10 mg/day, selegiline is MAO-B selective and routine tyramine restriction is not required, but limit intake of high-tyramine foods at higher doses or with the transdermal patch >6 mg/24 hr✓ Correct answer
Explanation
Correct (2): Selegiline is selective for MAO-B at low doses (≤10 mg PO daily or 6 mg/24-hr patch) — peripheral MAO-A is preserved so tyramine breakdown is largely intact and dietary restriction is generally not required. At higher doses or higher-strength patches, MAO-B selectivity is lost, and strict tyramine restriction applies as with nonselective MAOIs. (1) Overly restrictive. (3) Unrelated. (4) Levodopa absorption is hindered by protein.
In-depth explanation
Memory Tip MAO-B selective (selegiline, rasagiline) at low dose = no strict tyramine diet. NONselective MAOI (phenelzine, tranylcypromine) = strict tyramine restriction always.
Clinical scenario
Scenario 64-year-old female on selegiline 10 mg/day (an MAO-B selective inhibitor) for Parkinson disease, asking dietary teaching at outpatient follow-up.
Key concepts
MAO-B selective inhibitor — Selegiline or rasagiline at therapeutic PD doses; preserves peripheral MAO-A function.
Tyramine-induced hypertensive crisis — Severe BP elevation from tyramine accumulation when MAO-A is blocked; not typical with low-dose selegiline.