Drug interactions
Riluzole + Tobacco use
Severity: Minor
Riluzole 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, the main enzyme that metabolizes riluzole, so smokers may clear riluzole faster and have lower exposure. The clinical importance is uncertain, but reduced efficacy is theoretically possible.
What this interaction means in plain words
Riluzole 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 tobacco smoke induce CYP1A2, increasing riluzole metabolism.
What to do
No routine dose change is needed; be aware that smokers may have a reduced response. Reassess response if smoking status changes substantially.
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 Riluzole
- Fluvoxamine + Riluzole Major
- Cannabidiol + Riluzole Moderate
- Ciprofloxacin + Riluzole Moderate
- Elranatamab + Riluzole Moderate
- Epcoritamab + Riluzole Moderate
- Fexinidazole + Riluzole Moderate
Frequently asked questions
Can I take Riluzole with Tobacco use?
MediHelp rates the interaction as minor. Riluzole 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, the main enzyme that metabolizes riluzole, so smokers may clear riluzole faster and have lower exposure. The clinical importance is uncertain, but reduced efficacy is theoretically possible.
How serious is the interaction between Riluzole 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: No routine dose change is needed; be aware that smokers may have a reduced response. Reassess response if smoking status changes substantially.
What other medicines interact with Riluzole?
MediHelp also lists interactions of Riluzole with, for example, Fluvoxamine, Cannabidiol, Ciprofloxacin. The full list is on the Riluzole page.
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