Drug interactions
Lorcaserin + Perphenazine
Severity: Moderate
Lorcaserin and Perphenazine: 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 is a serotonin 5-HT2C agonist and, with other serotonergic or dopamine-active drugs, carries a theoretical risk of serotonin syndrome or neuroleptic malignant syndrome. Perphenazine is not a classic serotonergic drug, so the evidence for this pair is limited. Lorcaserin has also been withdrawn from the US market.
What this interaction means in plain words
Lorcaserin and Perphenazine 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
Possible additive serotonergic and dopaminergic effects; the mechanism is largely theoretical.
What to do
Monitor for agitation, tremor, hyperthermia, and rigidity if the combination is used. Consider an alternative weight-management agent.
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 Perphenazine
- Ibutilide + Perphenazine Contraindicated
- Perphenazine + Pimozide Contraindicated
- Perphenazine + Thioridazine Contraindicated
- Adagrasib + Perphenazine Major
- Alfentanil + Perphenazine Major
- Amiodarone + Perphenazine Major
Frequently asked questions
Can I take Lorcaserin with Perphenazine?
MediHelp rates the interaction as moderate. Lorcaserin and Perphenazine 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 is a serotonin 5-HT2C agonist and, with other serotonergic or dopamine-active drugs, carries a theoretical risk of serotonin syndrome or neuroleptic malignant syndrome. Perphenazine is not a classic serotonergic drug, so the evidence for this pair is limited. Lorcaserin has also been withdrawn from the US market.
How serious is the interaction between Lorcaserin and Perphenazine?
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 agitation, tremor, hyperthermia, and rigidity if the combination is used. Consider an alternative weight-management agent.
What other medicines interact with Perphenazine?
MediHelp also lists interactions of Perphenazine with, for example, Ibutilide, Pimozide, Thioridazine. The full list is on the Perphenazine page.
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