A client on levodopa-carbidopa is being evaluated for new se… | MyMerci
Medical EmergenciesPA
Question
A client on levodopa-carbidopa is being evaluated for new severe depression. Which medication on the medication reconciliation list most warrants a discussion with the provider before initiation?
1Sertraline (SSRI)
2Bupropion at the manufacturer-recommended dose
3Mirtazapine
4Phenelzine (nonselective MAOI)✓ Correct answer
Explanation
Correct (2): Nonselective MAOIs (phenelzine, tranylcypromine, isocarboxazid) are contraindicated with levodopa — they prevent breakdown of peripheral dopamine and norepinephrine causing severe hypertensive crisis. Wash-out of 14 days required before/after. (1) SSRIs require monitoring (rare serotonin syndrome with selegiline) but not absolute contraindication. (3) Mirtazapine is generally safe. (4) Bupropion requires caution but not absolute contraindication.
In-depth explanation
Memory Tip Levodopa + Nonselective MAOI = Hypertensive Crisis. Selegiline and rasagiline (selective MAO-B) at therapeutic doses are PD adjuncts; switching from a nonselective MAOI requires a 14-day washout before levodopa.
Clinical scenario
Scenario 70-year-old male, Parkinson disease on levodopa-carbidopa, evaluated for new severe major depression. New medications considered.
Key concepts
Nonselective MAOI — Phenelzine, tranylcypromine — block both MAO-A and MAO-B; contraindicated with levodopa.
Hypertensive crisis — Severe BP elevation from unopposed monoamine accumulation; potentially fatal.
MAOI washout — 14-day drug-free interval required before and after nonselective MAOI use.