Drug interactions
Levorphanol + Quetiapine
Severity: Major
Levorphanol and Quetiapine: 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
Opioids combined with sedating antipsychotics produce additive CNS and respiratory depression. This can cause profound sedation, hypotension and slowed breathing, especially in older or opioid-naive patients.
What this interaction means in plain words
Levorphanol and Quetiapine 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 central nervous system and respiratory depression.
What to do
Use the lowest effective doses and start with reduced doses of either drug. Monitor sedation and respiratory rate closely.
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 Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Levorphanol with Quetiapine?
MediHelp rates the interaction as major. Levorphanol and Quetiapine 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. Opioids combined with sedating antipsychotics produce additive CNS and respiratory depression. This can cause profound sedation, hypotension and slowed breathing, especially in older or opioid-naive patients.
How serious is the interaction between Levorphanol and Quetiapine?
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 doses and start with reduced doses of either drug. Monitor sedation and respiratory rate closely.
What other medicines interact with Quetiapine?
MediHelp also lists interactions of Quetiapine with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Quetiapine page.
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