Drug interactions
Fluphenazine + Tobacco use
Severity: Minor
Fluphenazine and Tobacco use: 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
Smoking induces CYP1A2, which may speed clearance of some phenothiazines and lower their plasma levels. Fluphenazine is mainly cleared by CYP2D6, so the effect is likely small, but changes in smoking status may alter response.
What this interaction means in plain words
Fluphenazine and Tobacco use 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
Polycyclic aromatic hydrocarbons in smoke induce CYP1A2, possibly increasing metabolism of fluphenazine.
What to do
Be aware of smoking status changes and reassess symptom control and adverse effects when a patient starts or stops smoking. Adjust the dose according to response.
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 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 Tobacco use?
MediHelp rates the interaction as minor. Fluphenazine and Tobacco use have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Smoking induces CYP1A2, which may speed clearance of some phenothiazines and lower their plasma levels. Fluphenazine is mainly cleared by CYP2D6, so the effect is likely small, but changes in smoking status may alter response.
How serious is the interaction between Fluphenazine and Tobacco use?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Be aware of smoking status changes and reassess symptom control and adverse effects when a patient starts or stops smoking. Adjust the dose according to response.
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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