All pairs

Phenelzine and Dextromethorphan

Desk tier: Avoid together

Mechanism: MAOI × serotonergic (serotonin syndrome / hypertensive crisis)

“NARDIL should not be used in combination with dextromethorphan or with CNS depressants such as alcohol and certain narcotics.”
Nardil (phenelzine), section CONTRAINDICATIONS. DailyMed label

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All pairs for Phenelzine · Dextromethorphan

Educational reference only. Not FDA-cleared. The Prescribing Information governs.