Drug interactions
Dantrolene + Diamorphine
Severity: Major
Dantrolene and Diamorphine: major 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
Diamorphine (heroin) is a strong opioid that depresses consciousness and breathing, and dantrolene can add drowsiness and muscle weakness. The combination may increase the risk of oversedation and respiratory compromise.
What this interaction means in plain words
Dantrolene and Diamorphine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive CNS and respiratory depression from opioid effects plus dantrolene sedation and muscle weakness.
What to do
Use the lowest effective diamorphine dose and titrate carefully, monitoring sedation level and respiratory rate. Reduce doses in elderly or respiratory-compromised patients.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Dantrolene
Frequently asked questions
Can I take Dantrolene with Diamorphine?
MediHelp rates the interaction as major. Dantrolene and Diamorphine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Diamorphine (heroin) is a strong opioid that depresses consciousness and breathing, and dantrolene can add drowsiness and muscle weakness. The combination may increase the risk of oversedation and respiratory compromise.
How serious is the interaction between Dantrolene and Diamorphine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective diamorphine dose and titrate carefully, monitoring sedation level and respiratory rate. Reduce doses in elderly or respiratory-compromised patients.
What other medicines interact with Dantrolene?
MediHelp also lists interactions of Dantrolene with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Dantrolene page.
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