Naltrexone and bupropion and Phenelzine interaction

Naltrexone and bupropion and Phenelzine: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.

Major

Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.

What the FDA labels say

From the Naltrexone and bupropion (Contrave Extended-Release) label · effective 2025-11-10

Major

…(e.g., buprenorphine) use, or acute opiate withdrawal [see Warnings and Precautions (5.4) and Drug Interactions (7.2) ] Patients undergoing an abrupt discontinuation of alcohol, benzodiazepines, barbiturates, and antiepileptic drugs [see Warnings and Precautions (5.3) and Drug Interactions (7.7) ] Concomitant administration of monoamine oxidase inhibitors (MAOI).

Contraindicationsby drug classView label on DailyMed
Major

At least 14 days should elapse between discontinuation of MAOI and initiation of treatment with CONTRAVE.

Contraindicationsby drug classView label on DailyMed
Major

There is an increased risk of hypertensive reactions when CONTRAVE is used concomitantly with MAOIs.

Contraindicationsby drug classView label on DailyMed
Major

Starting CONTRAVE in a patient treated with reversible MAOIs such as linezolid or intravenous methylene blue is also contraindicated [see Dosage and Administration (2.4) , Drug Interactions (7.1) ] Known allergy to bupropion, naltrexone or any other component of CONTRAVE.

Contraindicationsby drug classView label on DailyMed
Major

During or within 14 days of taking monoamine oxidase inhibitors (MAOI) ( 4 )

Contraindicationsby drug classView label on DailyMed

From the Phenelzine (phenelzine sulfate) label · effective 2026-05-21

Major

The concurrent administration of an MAO inhibitor and bupropion hydrochloride (Wellbutrin®) is contraindicated.

Contraindicationsnames Naltrexone and bupropionView label on DailyMed
Major

At least 14 days should elapse between discontinuation of an MAO inhibitor and initiation of treatment with bupropion hydrochloride.

Contraindicationsnames Naltrexone and bupropionView label on DailyMed
Major

Anyone considering the use of phenelzine sulfate or any other antidepressant in a child, adolescent, or young adult must balance this risk with the clinical need.

Boxed warningby drug classView label on DailyMed
Major

At least 14 days should elapse between the discontinuation of phenelzine sulfate and the institution of another antidepressant or buspirone HCl, or the discontinuation of another MAO inhibitor and the institution of phenelzine sulfate.

Contraindicationsby drug classView label on DailyMed
Moderate

Concomitant Use with Dibenzazepine Derivative Drugs If the decision is made to administer phenelzine sulfate concurrently with other antidepressant drugs, or within less than 10 days after discontinuation of antidepressant therapy, the patient should be cautioned by the physician regarding the possibility of adverse drug interaction.

Warningsby drug classView label on DailyMed

Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.

Open in the checker

Not medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.