Drug interactions
Fluphenazine + Lorcaserin
Severity: Moderate
Fluphenazine and Lorcaserin: 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
Lorcaserin has serotonergic activity and may inhibit CYP2D6, which participates in fluphenazine metabolism. This could raise fluphenazine exposure and, together with antipsychotic dopamine blockade, theoretically increase the risk of extrapyramidal effects, serotonin syndrome or neuroleptic malignant syndrome.
What this interaction means in plain words
Fluphenazine and Lorcaserin 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.
Why it happens
Lorcaserin inhibition of CYP2D6 may raise fluphenazine levels, plus additive serotonergic and dopaminergic effects.
What to do
Monitor for extrapyramidal symptoms, sedation, and signs of serotonin toxicity or neuroleptic malignant syndrome. Reduce the fluphenazine dose if adverse effects emerge.
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 Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Fluphenazine with Lorcaserin?
MediHelp rates the interaction as moderate. Fluphenazine and Lorcaserin 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. Lorcaserin has serotonergic activity and may inhibit CYP2D6, which participates in fluphenazine metabolism. This could raise fluphenazine exposure and, together with antipsychotic dopamine blockade, theoretically increase the risk of extrapyramidal effects, serotonin syndrome or neuroleptic malignant syndrome.
How serious is the interaction between Fluphenazine and Lorcaserin?
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 extrapyramidal symptoms, sedation, and signs of serotonin toxicity or neuroleptic malignant syndrome. Reduce the fluphenazine dose if adverse effects emerge.
What other medicines interact with Fluphenazine?
MediHelp also lists interactions of Fluphenazine with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Fluphenazine page.
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