Drug interactions
Lidocaine + Pentazocine
Severity: Minor
Lidocaine and Pentazocine: 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 can cause drowsiness and CNS depression at higher exposures, which may add to the sedative effect of pentazocine. The clinical effect is usually small at standard doses.
What this interaction means in plain words
Lidocaine and Pentazocine 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; Pentazocine belongs to Musculoskeletal.
Why it happens
Additive central nervous system depressant effects.
What to do
Monitor sedation and respiratory rate when systemic or high-dose lidocaine is given with pentazocine. Reduce the pentazocine dose if excessive drowsiness occurs.
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 Pentazocine
- Calcium / magnesium / potassium / sodium oxybates + Pentazocine Contraindicated
- Olanzapine / samidorphan + Pentazocine Contraindicated
- Pentazocine + Phenelzine Contraindicated
- Pentazocine + Tranylcypromine Contraindicated
- Alfentanil + Pentazocine Major
- Alprazolam + Pentazocine 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 Pentazocine?
MediHelp rates the interaction as minor. Lidocaine and Pentazocine 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 can cause drowsiness and CNS depression at higher exposures, which may add to the sedative effect of pentazocine. The clinical effect is usually small at standard doses.
How serious is the interaction between Lidocaine and Pentazocine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor sedation and respiratory rate when systemic or high-dose lidocaine is given with pentazocine. Reduce the pentazocine dose if excessive drowsiness occurs.
What other medicines interact with Pentazocine?
MediHelp also lists interactions of Pentazocine with, for example, Calcium / magnesium / potassium / sodium oxybates, Olanzapine / samidorphan, Phenelzine. The full list is on the Pentazocine page.
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