Drug interactions
Cimetidine + Nicotine intranasal
Severity: Minor
Cimetidine and Nicotine intranasal: 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
Cimetidine can modestly increase nicotine exposure by reducing its clearance. Clinically significant effects are uncommon.
What this interaction means in plain words
Cimetidine and Nicotine intranasal 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
Cimetidine inhibits hepatic nicotine metabolism and renal tubular secretion.
What to do
No routine adjustment is needed; lower the nicotine dose if signs of nicotine excess such as nausea or tachycardia 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 Cimetidine
- Cimetidine + Dofetilide Contraindicated
- Cimetidine + Fezolinetant Contraindicated
- Alfentanil + Cimetidine Major
- Atazanavir + Cimetidine Major
- Carmustine + Cimetidine Major
- Cimetidine + Citalopram Major
Frequently asked questions
Can I take Cimetidine with Nicotine intranasal?
MediHelp rates the interaction as minor. Cimetidine and Nicotine intranasal have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Cimetidine can modestly increase nicotine exposure by reducing its clearance. Clinically significant effects are uncommon.
How serious is the interaction between Cimetidine and Nicotine intranasal?
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 adjustment is needed; lower the nicotine dose if signs of nicotine excess such as nausea or tachycardia appear.
What other medicines interact with Cimetidine?
MediHelp also lists interactions of Cimetidine with, for example, Dofetilide, Fezolinetant, Alfentanil. The full list is on the Cimetidine page.
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