Drug interactions
Bromocriptine + Promethazine
Severity: Major
Bromocriptine and Promethazine: 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
The concurrent use of promethazine and bromocriptine may lead to a reduction in the therapeutic effects of bromocriptine. This interaction is particularly concerning as it can diminish the efficacy of bromocriptine in managing conditions such as hyperprolactinemia.
What this interaction means in plain words
Bromocriptine and Promethazine 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; Promethazine belongs to Respiratory.
Why it happens
Promethazine may antagonize the dopaminergic effects of bromocriptine, leading to decreased pharmacological activity of the latter.
What to do
It is advisable to avoid the combination of these two drugs whenever possible. If their use together is necessary, close monitoring of bromocriptine's effectiveness is recommended, and alternative treatments should be considered.
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 Promethazine
- Cabergoline + Promethazine Contraindicated
- Dopamine + Promethazine Contraindicated
- Ibutilide + Promethazine Contraindicated
- Pimozide + Promethazine Contraindicated
- Promethazine + Thioridazine Contraindicated
- Alfentanil + Promethazine Major
Other interactions of Bromocriptine
Frequently asked questions
Can I take Bromocriptine with Promethazine?
MediHelp rates the interaction as major. Bromocriptine and Promethazine 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. The concurrent use of promethazine and bromocriptine may lead to a reduction in the therapeutic effects of bromocriptine. This interaction is particularly concerning as it can diminish the efficacy of bromocriptine in managing conditions such as hyperprolactinemia.
How serious is the interaction between Bromocriptine and Promethazine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: It is advisable to avoid the combination of these two drugs whenever possible. If their use together is necessary, close monitoring of bromocriptine's effectiveness is recommended, and alternative treatments should be considered.
What other medicines interact with Promethazine?
MediHelp also lists interactions of Promethazine with, for example, Cabergoline, Dopamine, Ibutilide. The full list is on the Promethazine page.
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