Drug interactions
Oxymetazoline + Phenelzine
Severity: Major
Oxymetazoline and Phenelzine: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Phenelzine increases norepinephrine stores, which may heighten the response to alpha-adrenergic agonists. Intranasal oxymetazoline has low systemic absorption but may occasionally cause a hypertensive reaction, and MAOI labeling warns against sympathomimetics.
What this interaction means in plain words
Oxymetazoline and Phenelzine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Oxymetazoline belongs to Respiratory; Phenelzine belongs to Central Nervous System.
Why it happens
MAO inhibition increases neuronal norepinephrine, enhancing pressor responses to alpha-adrenergic agonists.
What to do
Avoid oxymetazoline in patients on phenelzine and use saline or other non-vasoconstrictor options. If used, monitor blood pressure and warn about severe headache.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Oxymetazoline
- Isocarboxazid + Oxymetazoline Major
- Oxymetazoline + Tranylcypromine Major
- Amitriptyline + Oxymetazoline Moderate
- Amoxapine + Oxymetazoline Moderate
- Clomipramine + Oxymetazoline Moderate
- Desipramine + Oxymetazoline Moderate
Other interactions of Phenelzine
- 5-HTP + Phenelzine Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amoxapine + Phenelzine Contraindicated
- Atomoxetine + Phenelzine Contraindicated
- Benzphetamine + Phenelzine Contraindicated
- Brimonidine + Phenelzine Contraindicated
Frequently asked questions
Can I take Oxymetazoline with Phenelzine?
MediHelp rates the interaction as major. Oxymetazoline and Phenelzine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Phenelzine increases norepinephrine stores, which may heighten the response to alpha-adrenergic agonists. Intranasal oxymetazoline has low systemic absorption but may occasionally cause a hypertensive reaction, and MAOI labeling warns against sympathomimetics.
How serious is the interaction between Oxymetazoline and Phenelzine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid oxymetazoline in patients on phenelzine and use saline or other non-vasoconstrictor options. If used, monitor blood pressure and warn about severe headache.
What other medicines interact with Oxymetazoline?
MediHelp also lists interactions of Oxymetazoline with, for example, Isocarboxazid, Tranylcypromine, Amitriptyline. The full list is on the Oxymetazoline page.
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