Drug interactions
Cyclizine + Phenylephrine po
Severity: Minor
Cyclizine and Phenylephrine po: minor 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
Oral phenylephrine is a weak sympathomimetic decongestant and cyclizine is a sedating antihistamine, so their CNS effects partly offset. Anticholinergic tachycardia from cyclizine could add to any pressor effects, but the clinical significance is small.
What this interaction means in plain words
Cyclizine and Phenylephrine po have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Opposing CNS effects and possible additive heart rate or blood pressure effects; no defined mechanism.
What to do
No specific action beyond monitoring blood pressure and heart rate in patients with cardiovascular disease.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Cyclizine
- Calcium / magnesium / potassium / sodium oxybates + Cyclizine Major
- Cyclizine + Henbane Major
- Cyclizine + Sodium oxybate Major
- Abobotulinumtoxina + Cyclizine Moderate
- Alfentanil + Cyclizine Moderate
- Alprazolam + Cyclizine Moderate
Frequently asked questions
Can I take Cyclizine with Phenylephrine po?
MediHelp rates the interaction as minor. Cyclizine and Phenylephrine po have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Oral phenylephrine is a weak sympathomimetic decongestant and cyclizine is a sedating antihistamine, so their CNS effects partly offset. Anticholinergic tachycardia from cyclizine could add to any pressor effects, but the clinical significance is small.
How serious is the interaction between Cyclizine and Phenylephrine po?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No specific action beyond monitoring blood pressure and heart rate in patients with cardiovascular disease.
What other medicines interact with Cyclizine?
MediHelp also lists interactions of Cyclizine with, for example, Calcium / magnesium / potassium / sodium oxybates, Henbane, Sodium oxybate. The full list is on the Cyclizine page.
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