Drug interactions
Fenfluramine + Methyldopa
Severity: Moderate
Fenfluramine and Methyldopa: 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
Fenfluramine has effects on blood pressure and may interfere with antihypertensive control. Fenfluramine also carries a risk of valvular heart disease and pulmonary hypertension, so cardiovascular status needs monitoring.
What this interaction means in plain words
Fenfluramine and Methyldopa 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; Methyldopa belongs to Cardiovascular.
Why it happens
Mechanism is not well established; likely pharmacodynamic interplay between serotonergic and sympathetic effects on blood pressure.
What to do
Monitor blood pressure and heart rate during combined use. Continue the echocardiographic monitoring required for fenfluramine.
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?
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Other interactions of Methyldopa
- Methyldopa + Tranylcypromine Contraindicated
- Iobenguane i + Methyldopa Major
- Lofexidine + Methyldopa Major
- Methyldopa + Pexidartinib Major
- Methyldopa + Pretomanid Major
- Methyldopa + Thioridazine Major
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 Methyldopa?
MediHelp rates the interaction as moderate. Fenfluramine and Methyldopa 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 has effects on blood pressure and may interfere with antihypertensive control. Fenfluramine also carries a risk of valvular heart disease and pulmonary hypertension, so cardiovascular status needs monitoring.
How serious is the interaction between Fenfluramine and Methyldopa?
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 blood pressure and heart rate during combined use. Continue the echocardiographic monitoring required for fenfluramine.
What other medicines interact with Methyldopa?
MediHelp also lists interactions of Methyldopa with, for example, Tranylcypromine, Iobenguane i, Lofexidine. The full list is on the Methyldopa page.
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