Drug interactions
Doxapram + Phenylephrine
Severity: Moderate
Doxapram and Phenylephrine: 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
Both drugs raise blood pressure, and doxapram is a respiratory stimulant with pressor effects. Together they may produce additive hypertension and arrhythmias.
What this interaction means in plain words
Doxapram and Phenylephrine 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.
Doxapram belongs to Central Nervous System; Phenylephrine belongs to Respiratory.
Why it happens
Additive pressor effects through sympathetic stimulation.
What to do
Monitor blood pressure and ECG during coadministration, and reduce the dose of the vasopressor if hypertension develops.
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 Doxapram
- Desflurane + Doxapram Major
- Dextroamphetamine + Doxapram Major
- Doxapram + Isocarboxazid Major
- Doxapram + Ketamine Major
- Doxapram + Linezolid Major
- Doxapram + Lisdexamfetamine Major
Frequently asked questions
Can I take Doxapram with Phenylephrine?
MediHelp rates the interaction as moderate. Doxapram and Phenylephrine 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. Both drugs raise blood pressure, and doxapram is a respiratory stimulant with pressor effects. Together they may produce additive hypertension and arrhythmias.
How serious is the interaction between Doxapram and Phenylephrine?
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 and ECG during coadministration, and reduce the dose of the vasopressor if hypertension develops.
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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