Drug interactions
Duloxetine + Smoking
Severity: Minor
Duloxetine and Smoking: 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
Tobacco smoke induces CYP1A2, which is a main route of duloxetine metabolism, so smokers have lower duloxetine exposure. The reduction is generally modest and does not usually need a dose change.
What this interaction means in plain words
Duloxetine and Smoking 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
Induction of CYP1A2 by polycyclic aromatic hydrocarbons in smoke increases duloxetine clearance.
What to do
No routine dose adjustment is needed. Titrate to clinical response and reassess if the patient starts or stops smoking.
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 Duloxetine
- Duloxetine + Isocarboxazid Contraindicated
- Duloxetine + Linezolid Contraindicated
- Duloxetine + Methylene blue Contraindicated
- Duloxetine + Phenelzine Contraindicated
- Duloxetine + Procarbazine Contraindicated
- Duloxetine + Rasagiline Contraindicated
Frequently asked questions
Can I take Duloxetine with Smoking?
MediHelp rates the interaction as minor. Duloxetine and Smoking have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Tobacco smoke induces CYP1A2, which is a main route of duloxetine metabolism, so smokers have lower duloxetine exposure. The reduction is generally modest and does not usually need a dose change.
How serious is the interaction between Duloxetine and Smoking?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine dose adjustment is needed. Titrate to clinical response and reassess if the patient starts or stops smoking.
What other medicines interact with Duloxetine?
MediHelp also lists interactions of Duloxetine with, for example, Isocarboxazid, Linezolid, Methylene blue. The full list is on the Duloxetine page.
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