Drug interactions
Ether + Phenylephrine
Severity: Major
Ether and Phenylephrine: 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
Ether is a volatile anesthetic that sensitizes the myocardium to catecholamines, which may cause ventricular arrhythmias when given with adrenergic agents such as phenylephrine. Hypertension may also occur. Ether is now rarely used in clinical practice.
What this interaction means in plain words
Ether and Phenylephrine 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.
Why it happens
Myocardial sensitization to catecholamines by the anesthetic combined with adrenergic vasoconstriction.
What to do
Avoid concurrent use where possible, use ECG monitoring, and titrate phenylephrine cautiously with a lower dose.
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 Phenylephrine
- Isocarboxazid + Phenylephrine Contraindicated
- Phenelzine + Phenylephrine Contraindicated
- Phenylephrine + Tranylcypromine Contraindicated
- Bromocriptine + Phenylephrine Major
- Cocaine + Phenylephrine Major
- Dihydroergotamine intranasal + Phenylephrine Major
Frequently asked questions
Can I take Ether with Phenylephrine?
MediHelp rates the interaction as major. Ether and Phenylephrine 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. Ether is a volatile anesthetic that sensitizes the myocardium to catecholamines, which may cause ventricular arrhythmias when given with adrenergic agents such as phenylephrine. Hypertension may also occur. Ether is now rarely used in clinical practice.
How serious is the interaction between Ether and Phenylephrine?
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 concurrent use where possible, use ECG monitoring, and titrate phenylephrine cautiously with a lower dose.
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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