Drug interactions
Cabergoline + Fenfluramine
Severity: Major
Cabergoline and Fenfluramine: 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
Both cabergoline and fenfluramine are linked to cardiac valvulopathy through serotonin 5-HT2B receptor activation, so combined use may compound the risk of valve damage and pulmonary hypertension. Fenfluramine also has serotonergic activity that raises concern about serotonin toxicity and blood pressure effects. Fenfluramine labeling requires cardiac echocardiographic monitoring.
What this interaction means in plain words
Cabergoline and Fenfluramine 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.
Cabergoline belongs to Endocrine; Fenfluramine belongs to Central Nervous System.
Why it happens
Additive 5-HT2B receptor agonism causing valvulopathy, together with additive serotonergic and vasoconstrictive effects.
What to do
Avoid the combination where possible; if it is unavoidable, perform baseline and periodic echocardiography and monitor blood pressure and for signs of serotonin toxicity.
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 Cabergoline
Other interactions of Fenfluramine
- Fenfluramine + Isocarboxazid Contraindicated
- Fenfluramine + Linezolid Contraindicated
- Fenfluramine + Phenelzine Contraindicated
- Fenfluramine + Selegiline Contraindicated
- Fenfluramine + Tranylcypromine Contraindicated
- Almotriptan + Fenfluramine Major
Frequently asked questions
Can I take Cabergoline with Fenfluramine?
MediHelp rates the interaction as major. Cabergoline and Fenfluramine 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. Both cabergoline and fenfluramine are linked to cardiac valvulopathy through serotonin 5-HT2B receptor activation, so combined use may compound the risk of valve damage and pulmonary hypertension. Fenfluramine also has serotonergic activity that raises concern about serotonin toxicity and blood pressure effects. Fenfluramine labeling requires cardiac echocardiographic monitoring.
How serious is the interaction between Cabergoline and Fenfluramine?
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 the combination where possible; if it is unavoidable, perform baseline and periodic echocardiography and monitor blood pressure and for signs of serotonin toxicity.
What other medicines interact with Cabergoline?
MediHelp also lists interactions of Cabergoline with, for example, Benperidol, Chlorpromazine, Clarithromycin. The full list is on the Cabergoline page.
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