Drug interactions
Lorcaserin + Quetiapine
Severity: Moderate
Lorcaserin and Quetiapine: 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 combining it with an antipsychotic could rarely contribute to serotonin syndrome or neuroleptic malignant syndrome. Lorcaserin has been withdrawn from the US market, so this is of limited practical relevance. Evidence is largely theoretical.
What this interaction means in plain words
Lorcaserin and Quetiapine 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
Additive serotonergic effects with 5-HT2C agonism and dopamine receptor blockade.
What to do
If used together, monitor for mental status change, hyperthermia, rigidity and autonomic instability. Stop lorcaserin if serotonin toxicity is suspected.
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 Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Lorcaserin with Quetiapine?
MediHelp rates the interaction as moderate. Lorcaserin and Quetiapine 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 combining it with an antipsychotic could rarely contribute to serotonin syndrome or neuroleptic malignant syndrome. Lorcaserin has been withdrawn from the US market, so this is of limited practical relevance. Evidence is largely theoretical.
How serious is the interaction between Lorcaserin and Quetiapine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: If used together, monitor for mental status change, hyperthermia, rigidity and autonomic instability. Stop lorcaserin if serotonin toxicity is suspected.
What other medicines interact with Quetiapine?
MediHelp also lists interactions of Quetiapine with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Quetiapine page.
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