Drug interactions

Bromocriptine + Ritonavir

Severity: Major

Bromocriptine and Ritonavir: major interaction.

Last updated 29 Oct 2026 Sources: US FDA label

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

Ritonavir is a strong CYP3A4 inhibitor and may substantially increase bromocriptine exposure, with risk of hypotension, syncope, nausea and neuropsychiatric effects.

What this interaction means in plain words

Bromocriptine and Ritonavir 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; Ritonavir belongs to Anti Virals.

Evidence level: Moderate

Why it happens

Strong CYP3A4 inhibition reduces bromocriptine clearance.

What to do

Avoid if possible; if necessary, use a markedly reduced bromocriptine dose and monitor blood pressure and CNS effects closely.

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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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References

Bromocriptine mesylate - FDA drug label (DailyMed) - section 7 Drug Interactions (class statement: HIV protease inhibitors; "Caution should therefore be used when co-administering drugs which are strong inhibitors of this enzyme (such as azole antimycotics, HIV protease inhibitors).") — DailyMed (FDA label)

Amisulpride + Bromocriptine Major
Atazanavir + Bromocriptine Major
Bromocriptine + Cobicistat Major
Bromocriptine + Darunavir Major
Bromocriptine + Dihydroergotamine Major
Bromocriptine + Dihydroergotamine intranasal Major

Alfuzosin + Ritonavir Contraindicated
Amiodarone + Ritonavir Contraindicated
Avanafil + Ritonavir Contraindicated
Colchicine + Ritonavir Contraindicated
Dronedarone + Ritonavir Contraindicated
Eletriptan + Ritonavir Contraindicated

Frequently asked questions

Can I take Bromocriptine with Ritonavir?

MediHelp rates the interaction as major. Bromocriptine and Ritonavir 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. Ritonavir is a strong CYP3A4 inhibitor and may substantially increase bromocriptine exposure, with risk of hypotension, syncope, nausea and neuropsychiatric effects.

How serious is the interaction between Bromocriptine and Ritonavir?

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 if possible; if necessary, use a markedly reduced bromocriptine dose and monitor blood pressure and CNS effects closely.

What other medicines interact with Bromocriptine?

MediHelp also lists interactions of Bromocriptine with, for example, Amisulpride, Atazanavir, Cobicistat. The full list is on the Bromocriptine page.

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