Drug interactions
Bromocriptine + Phenylephrine
Severity: Major
Bromocriptine 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
Bromocriptine has been associated with hypertension and rarely arrhythmias, and combining it with a vasopressor such as phenylephrine may produce a greater rise in blood pressure. Severe hypertension, headache and cardiac events have been reported with ergot-type agents plus sympathomimetics.
What this interaction means in plain words
Bromocriptine 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.
Bromocriptine belongs to Central Nervous System; Phenylephrine belongs to Respiratory.
Why it happens
Additive vasoconstrictive and pressor effects through pharmacodynamic synergism.
What to do
Avoid concomitant decongestant use with bromocriptine where possible and monitor blood pressure closely if phenylephrine is required. Stop therapy and seek care for severe headache or marked hypertension.
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
- Cocaine + Phenylephrine Major
- Dihydroergotamine intranasal + Phenylephrine Major
- Dihydroergotamine + Phenylephrine Major
Other interactions of Bromocriptine
Frequently asked questions
Can I take Bromocriptine with Phenylephrine?
MediHelp rates the interaction as major. Bromocriptine 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. Bromocriptine has been associated with hypertension and rarely arrhythmias, and combining it with a vasopressor such as phenylephrine may produce a greater rise in blood pressure. Severe hypertension, headache and cardiac events have been reported with ergot-type agents plus sympathomimetics.
How serious is the interaction between Bromocriptine 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 concomitant decongestant use with bromocriptine where possible and monitor blood pressure closely if phenylephrine is required. Stop therapy and seek care for severe headache or marked hypertension.
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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