Brompheniramine, pseudoephedrine, and dextromethorphan and Tranylcypromine interaction

Brompheniramine, pseudoephedrine, and dextromethorphan and Tranylcypromine: 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 Tranylcypromine (Tranylcypromine Sulfate) label · effective 2025-07-25

Major

…(SSRIs) and serotonin and norepinephrine reuptake inhibitors (SNRIs) tricyclic antidepressants other antidepressants, such as amoxapine, bupropion, maprotiline, nefazodone, trazodone, vilazodone, vortioxetine amphetamines and methylphenidates medicines that can raise blood pressure (sympathomimetic medicine), such as pseudoephedrine, phenylephrine and ephedrine.

Boxed warningnames Brompheniramine, pseudoephedrine, and dextromethorphanView label on DailyMed
Major

…medicines are in some cold, hay fever or weight-loss medicines. sympathomimetic herbal medicines or dietary supplements antihistamines (allergy medicines) triptans buspirone carbamazepine dextromethorphan dopamine hydroxytryptophan and tryptophan levodopa and methyldopa meperidine rasagline resperine s-adenosyl-L-methionine (SAM-e) tapentadol tetrabenazin Ask your healthcare…

Boxed warningnames Brompheniramine, pseudoephedrine, and dextromethorphanView label on DailyMed
Major

…Orthostatic hypotension e Buspirone Contraindicated a HR Carbamazepine Contraindicated a SS Chlorpromazine Use with caution d Hypotensive effects e Cyclobenzaprine Contraindicated a SS Dextromethorphan Contraindicated a SS; Psychosis, bizarre behavior Dopamine Contraindicated a HR Droperidol Use with caution d QT interval prolongation Entacapone Use with caution d…

Drug interactionsnames Brompheniramine, pseudoephedrine, and dextromethorphanView label on DailyMed
Major

Concomitant use or use in rapid succession with other MAOIs; selective serotonin reuptake inhibitors; serotonin and norepinephrine reuptake inhibitors; tricyclic antidepressants; sympathomimetic drugs; and numerous other drugs.

Contraindicationsby drug classView label on DailyMed
Major

Table 1: Products Contraindicated with the Use of Tranylcypromine Sulfate Tablets Drug Classes Non-selective H1 receptor antagonists Antidepressants including but not limited to: Other monoamine oxidase inhibitors (MAOIs) Selective serotonin reuptake inhibitors (SSRIs) and serotonin and norepinephrine reuptake inhibitors (SNRIs) Tricyclic antidepressants Other…

Contraindicationsby drug classView label on DailyMed

From the Brompheniramine, pseudoephedrine, and dextromethorphan (Brompheniramine Maleate, Pseudoephedrine Hydrochloride and Dextromethorphan Hydrobromide) label · effective 2026-01-13

Major

Do not use dextromethorphan in patients receiving monoamine oxidase (MAOI) inhibitors ( see PRECAUTIONS – Drug Interactions ).

Contraindicationsby drug classView label on DailyMed
Major

Drug Interactions Monoamine oxidase (MAO) inhibitors Hyperpyrexia, hypotension, and death have been reported coincident with the coadministration of MAO inhibitors and products containing dextromethorphan.

Drug interactionsby drug classView label on DailyMed
Major

Concomitant administration of Brompheniramine Maleate, Pseudoephedrine Hydrochloride and Dextromethorphan Hydrobromide Oral Syrup and MAO inhibitors should be avoided ( see CONTRAINDICATIONS ).

Drug interactionsby drug classView label on DailyMed
Moderate

In addition, MAO inhibitors prolong and intensify the anticholinergic (drying) effects of antihistamines and may enhance the effect of pseudoephedrine.

Drug interactionsby drug classView label on DailyMed

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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.