Drug interactions
Diamorphine + Lidocaine
Severity: Minor
Diamorphine and Lidocaine: 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 may add to the sedative and respiratory depressant effects of diamorphine. This is usually of concern only with intravenous or large-dose lidocaine, and the combination is also used deliberately in some analgesic regimens.
What this interaction means in plain words
Diamorphine and Lidocaine 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
Additive CNS and respiratory depression.
What to do
Monitor sedation and respiratory rate when systemic lidocaine is combined with diamorphine, and titrate the opioid to effect.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Diamorphine and Lidocaine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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 Diamorphine with Lidocaine?
MediHelp rates the interaction as minor. Diamorphine and Lidocaine 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 may add to the sedative and respiratory depressant effects of diamorphine. This is usually of concern only with intravenous or large-dose lidocaine, and the combination is also used deliberately in some analgesic regimens.
How serious is the interaction between Diamorphine and Lidocaine?
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 lidocaine is combined with diamorphine, and titrate the opioid to effect.
What other medicines interact with Lidocaine?
MediHelp also lists interactions of Lidocaine with, for example, Bupivacaine liposome, Disopyramide, Ex vivo expanded autologous human corneal epithelial cells containing stem cells. The full list is on the Lidocaine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
