Drug interactions
Fenfluramine + Loxapine
Severity: Moderate
Fenfluramine and Loxapine: 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 increases serotonin release and may add serotonergic effects to loxapine's receptor activity, while its stimulant-like properties may offset sedation. Both drugs can lower the seizure threshold or cause somnolence, and the net effect is unpredictable.
What this interaction means in plain words
Fenfluramine and Loxapine 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; Loxapine belongs to Central Nervous System.
Why it happens
Possible additive serotonergic and CNS effects; mechanism not firmly established.
What to do
Monitor for sedation, seizure frequency, and signs of serotonin toxicity such as agitation, tremor, and hyperthermia. Echocardiographic monitoring for fenfluramine continues as labeled.
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 Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine 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 Loxapine?
MediHelp rates the interaction as moderate. Fenfluramine and Loxapine 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 increases serotonin release and may add serotonergic effects to loxapine's receptor activity, while its stimulant-like properties may offset sedation. Both drugs can lower the seizure threshold or cause somnolence, and the net effect is unpredictable.
How serious is the interaction between Fenfluramine and Loxapine?
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 for sedation, seizure frequency, and signs of serotonin toxicity such as agitation, tremor, and hyperthermia. Echocardiographic monitoring for fenfluramine continues as labeled.
What other medicines interact with Loxapine?
MediHelp also lists interactions of Loxapine with, for example, Alfentanil, Alprazolam, Amisulpride. The full list is on the Loxapine page.
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