Drug interactions
Fenfluramine + Methylphenidate
Severity: Moderate
Fenfluramine and Methylphenidate: 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 affect monoamines and may raise blood pressure and heart rate, and fenfluramine's serotonergic effects add concern for agitation or serotonin toxicity. Fenfluramine also carries a risk of valvular heart disease and pulmonary hypertension, which makes added cardiovascular stimulation undesirable.
What this interaction means in plain words
Fenfluramine and Methylphenidate 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; Methylphenidate belongs to Central Nervous System.
Why it happens
Additive monoaminergic effects: serotonin release by fenfluramine and catecholamine reuptake inhibition by methylphenidate.
What to do
Monitor blood pressure, heart rate and symptoms of serotonin toxicity, and follow the scheduled echocardiographic monitoring 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 Methylphenidate
- Isocarboxazid + Methylphenidate Contraindicated
- Linezolid + Methylphenidate Contraindicated
- Methylphenidate + Phenelzine Contraindicated
- Methylphenidate + Procarbazine Contraindicated
- Methylphenidate + Rasagiline Contraindicated
- Methylphenidate + Safinamide Contraindicated
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 Methylphenidate?
MediHelp rates the interaction as moderate. Fenfluramine and Methylphenidate 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 affect monoamines and may raise blood pressure and heart rate, and fenfluramine's serotonergic effects add concern for agitation or serotonin toxicity. Fenfluramine also carries a risk of valvular heart disease and pulmonary hypertension, which makes added cardiovascular stimulation undesirable.
How serious is the interaction between Fenfluramine and Methylphenidate?
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, heart rate and symptoms of serotonin toxicity, and follow the scheduled echocardiographic monitoring for fenfluramine.
What other medicines interact with Methylphenidate?
MediHelp also lists interactions of Methylphenidate with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Methylphenidate page.
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