Drug interactions
Phenylephrine + Safinamide
Severity: Moderate
Phenylephrine and Safinamide: 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
Safinamide is an MAO-B inhibitor and may potentiate the pressor effect of sympathomimetics such as phenylephrine. Labeling advises monitoring for hypertension with decongestants and other sympathomimetics.
What this interaction means in plain words
Phenylephrine and Safinamide 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.
Phenylephrine belongs to Respiratory; Safinamide belongs to Central Nervous System.
Why it happens
MAO inhibition reduces catecholamine metabolism and enhances adrenergic pressor effects.
What to do
Monitor blood pressure when systemic or nasal phenylephrine is used with safinamide. Prefer non-sympathomimetic alternatives for congestion.
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 Phenylephrine
- Isocarboxazid + Phenylephrine Contraindicated
- Phenelzine + Phenylephrine Contraindicated
- Phenylephrine + Tranylcypromine Contraindicated
- Bromocriptine + Phenylephrine Major
- Cocaine + Phenylephrine Major
- Dihydroergotamine intranasal + Phenylephrine Major
Other interactions of Safinamide
- Amitriptyline + Safinamide Contraindicated
- Amoxapine + Safinamide Contraindicated
- Amphetamine polistirex + Safinamide Contraindicated
- Clomipramine + Safinamide Contraindicated
- Cyclobenzaprine + Safinamide Contraindicated
- Desipramine + Safinamide Contraindicated
Frequently asked questions
Can I take Phenylephrine with Safinamide?
MediHelp rates the interaction as moderate. Phenylephrine and Safinamide 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. Safinamide is an MAO-B inhibitor and may potentiate the pressor effect of sympathomimetics such as phenylephrine. Labeling advises monitoring for hypertension with decongestants and other sympathomimetics.
How serious is the interaction between Phenylephrine and Safinamide?
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 when systemic or nasal phenylephrine is used with safinamide. Prefer non-sympathomimetic alternatives for congestion.
What other medicines interact with Phenylephrine?
MediHelp also lists interactions of Phenylephrine with, for example, Isocarboxazid, Phenelzine, Tranylcypromine. The full list is on the Phenylephrine page.
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