Drug interactions
Lidocaine + Tamsulosin
Severity: Minor
Lidocaine and Tamsulosin: 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
Systemic lidocaine is metabolized by CYP3A4 and CYP1A2 and has only weak inhibitory activity, so a clinically important rise in tamsulosin levels is unlikely. The interaction is largely theoretical.
What this interaction means in plain words
Lidocaine and Tamsulosin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Lidocaine belongs to Cardiovascular; Tamsulosin belongs to Genitourinary.
Why it happens
Lidocaine may weakly inhibit CYP3A4 and CYP2D6, but the effect is not well established.
What to do
No routine action is needed. Be aware of dizziness or hypotension if lidocaine is given systemically.
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 Tamsulosin
- Alfuzosin + Tamsulosin Major
- Avanafil + Tamsulosin Major
- Ceritinib + Tamsulosin Major
- Clarithromycin + Tamsulosin Major
- Cobicistat + Tamsulosin Major
- Doxazosin + Tamsulosin Major
Other interactions of Lidocaine
- Bupivacaine liposome + Lidocaine Major
- Disopyramide + Lidocaine Major
- Ex vivo expanded autologous human corneal epithelial cells containing stem cells + Lidocaine Major
- Lidocaine + Nirmatrelvir / ritonavir Major
- Lidocaine + Ombitasvir / paritaprevir / ritonavir and dasabuvir Major
- Lidocaine + Pimozide Major
Frequently asked questions
Can I take Lidocaine with Tamsulosin?
MediHelp rates the interaction as minor. Lidocaine and Tamsulosin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Systemic lidocaine is metabolized by CYP3A4 and CYP1A2 and has only weak inhibitory activity, so a clinically important rise in tamsulosin levels is unlikely. The interaction is largely theoretical.
How serious is the interaction between Lidocaine and Tamsulosin?
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 action is needed. Be aware of dizziness or hypotension if lidocaine is given systemically.
What other medicines interact with Tamsulosin?
MediHelp also lists interactions of Tamsulosin with, for example, Alfuzosin, Avanafil, Ceritinib. The full list is on the Tamsulosin page.
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