Bromocriptine and Clarithromycin interaction
Bromocriptine and Clarithromycin: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Bromocriptine (CYCLOSET) label · effective 2026-01-12
Concomitant use of strong CYP3A4 inhibitors (e.g., azole antimycotics, HIV protease inhibitors) with CYCLOSET should be avoided.
Avoid concomitant use of CYCLOSET with strong CYP3A4 inhibitors.
CYCLOSET dose should not exceed 1.6 mg once daily during concomitant use of a moderate CYP3A4 inhibitor (e.g., erythromycin).
Limit CYCLOSET dose to 1.6 mg/day during concomitant use of moderate CYP3A4 inhibitors.
Ensure adequate washout of the strong CYP3A4 inhibitor drug before initiating CYCLOSET treatment [see Clinical Pharmacology (12.3) ] .
From the Clarithromycin label · effective 2026-01-01
Ergot alkaloids (ergotamine or dihydroergotamine) ( 4.6 )
Ergot Alkaloids Concomitant administration of clarithromycin and ergotamine or dihydroergotamine is contraindicated [see Drug Interactions ( 7 )] .
The use of clarithromycin with lomitapide, simvastatin, lovastatin, ergotamine, or dihydroergotamine is contraindicated [see Contraindications ( 4.5 , 4.6 ) and Drug Interactions ( 7 )].
Ergot Alkaloids: Ergotamine Dihydroergotamine Contraindicated Ergotamine, Dihydroergotamine: Postmarketing reports indicate that coadministration of clarithromycin with ergotamine or dihydroergotamine has been associated with acute ergot toxicity characterized by vasospasm and ischemia of the extremities and other tissues including the central nervous system…
John’s Wort Use With Caution There have been spontaneous or published reports of CYP3A based interactions of clarithromycin with alfentanil, methylprednisolone, cilostazol, bromocriptine, vinblastine, phenobarbital, and St.
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.