Drug interactions
Paliperidone + Phenelzine
Severity: Moderate
Paliperidone and Phenelzine: moderate 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 with paliperidone may cause additive orthostatic hypotension and sedation. Serotonin toxicity or neuroleptic malignant syndrome are uncommon but possible when monoamine levels are raised in the presence of dopamine blockade.
What this interaction means in plain words
Paliperidone and Phenelzine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Paliperidone belongs to Central Nervous System; Phenelzine belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic effects of MAO inhibition with D2/5-HT2A antagonism and alpha-1 adrenergic blockade.
What to do
Monitor blood pressure, orthostatic symptoms, mental status and temperature when initiating or titrating. Stop the antipsychotic and seek urgent care if hyperthermia, rigidity or autonomic instability occurs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Phenelzine
- 5-HTP + Phenelzine Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amoxapine + Phenelzine Contraindicated
- Atomoxetine + Phenelzine Contraindicated
- Benzphetamine + Phenelzine Contraindicated
- Brimonidine + Phenelzine Contraindicated
Other interactions of Paliperidone
- Ibutilide + Paliperidone Contraindicated
- Paliperidone + Pimozide Contraindicated
- Paliperidone + Vandetanib Contraindicated
- Adagrasib + Paliperidone Major
- Amiodarone + Paliperidone Major
- Amisulpride + Paliperidone Major
Frequently asked questions
Can I take Paliperidone with Phenelzine?
MediHelp rates the interaction as moderate. Paliperidone and Phenelzine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Phenelzine with paliperidone may cause additive orthostatic hypotension and sedation. Serotonin toxicity or neuroleptic malignant syndrome are uncommon but possible when monoamine levels are raised in the presence of dopamine blockade.
How serious is the interaction between Paliperidone and Phenelzine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, orthostatic symptoms, mental status and temperature when initiating or titrating. Stop the antipsychotic and seek urgent care if hyperthermia, rigidity or autonomic instability occurs.
What other medicines interact with Phenelzine?
MediHelp also lists interactions of Phenelzine with, for example, 5-HTP, Amitriptyline, Amoxapine. The full list is on the Phenelzine page.
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