Drug interactions
Lorcaserin + Propafenone
Severity: Minor
Lorcaserin and Propafenone: minor 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 may inhibit CYP2D6 and slightly raise propafenone levels. The effect is likely modest, but higher propafenone exposure can increase conduction and proarrhythmic effects.
What this interaction means in plain words
Lorcaserin and Propafenone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Weak CYP2D6 inhibition by lorcaserin.
What to do
Monitor heart rate and ECG, and reduce the propafenone dose if bradycardia or conduction changes appear.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Propafenone
- Dofetilide + Propafenone Contraindicated
- Dronedarone + Propafenone Contraindicated
- Nilotinib + Propafenone Contraindicated
- Nirmatrelvir / ritonavir + Propafenone Contraindicated
- Nirmatrelvir + Propafenone Contraindicated
- Pimozide + Propafenone Contraindicated
Frequently asked questions
Can I take Lorcaserin with Propafenone?
MediHelp rates the interaction as minor. Lorcaserin and Propafenone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Lorcaserin may inhibit CYP2D6 and slightly raise propafenone levels. The effect is likely modest, but higher propafenone exposure can increase conduction and proarrhythmic effects.
How serious is the interaction between Lorcaserin and Propafenone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor heart rate and ECG, and reduce the propafenone dose if bradycardia or conduction changes appear.
What other medicines interact with Propafenone?
MediHelp also lists interactions of Propafenone with, for example, Dofetilide, Dronedarone, Nilotinib. The full list is on the Propafenone page.
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