Drug interactions
Fenfluramine + Isoproterenol
Severity: Moderate
Fenfluramine and Isoproterenol: moderate 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 drugs can raise heart rate and blood pressure, so combined use may cause additive cardiovascular stimulation. Fenfluramine also carries valvular heart disease and pulmonary hypertension warnings, which makes extra cardiac stress more relevant.
What this interaction means in plain words
Fenfluramine and Isoproterenol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Fenfluramine belongs to Central Nervous System; Isoproterenol belongs to Respiratory.
Why it happens
Additive pharmacodynamic sympathetic effects, with direct beta agonism from isoproterenol and serotonergic or adrenergic activity from fenfluramine.
What to do
Monitor heart rate, blood pressure and ECG when used together. Reduce or stop isoproterenol if tachyarrhythmia or hypertension occurs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Fenfluramine and Isoproterenol, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Isoproterenol
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 Fenfluramine with Isoproterenol?
MediHelp rates the interaction as moderate. Fenfluramine and Isoproterenol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both drugs can raise heart rate and blood pressure, so combined use may cause additive cardiovascular stimulation. Fenfluramine also carries valvular heart disease and pulmonary hypertension warnings, which makes extra cardiac stress more relevant.
How serious is the interaction between Fenfluramine and Isoproterenol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor heart rate, blood pressure and ECG when used together. Reduce or stop isoproterenol if tachyarrhythmia or hypertension occurs.
What other medicines interact with Isoproterenol?
MediHelp also lists interactions of Isoproterenol with, for example, Adrenaline-articaine, Bisoprolol, Budesonide-formoterol. The full list is on the Isoproterenol page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
