Drug interactions
Loxapine + Papaveretum
Severity: Major
Loxapine and Papaveretum: major interaction.
Last updated Sources: US FDA label
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
Papaveretum contains opium alkaloids, including morphine, and combined with loxapine can cause additive sedation, hypotension and respiratory depression. The combination can be dangerous at higher doses or in frail patients.
What this interaction means in plain words
Loxapine and Papaveretum 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 agonism and antipsychotic sedation.
What to do
Start with reduced opioid doses and titrate carefully, monitoring respiratory rate, sedation and blood pressure. Avoid additional CNS depressants.
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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References
Other interactions of Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine Major
Frequently asked questions
Can I take Loxapine with Papaveretum?
MediHelp rates the interaction as major. Loxapine and Papaveretum 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. Papaveretum contains opium alkaloids, including morphine, and combined with loxapine can cause additive sedation, hypotension and respiratory depression. The combination can be dangerous at higher doses or in frail patients.
How serious is the interaction between Loxapine and Papaveretum?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Start with reduced opioid doses and titrate carefully, monitoring respiratory rate, sedation and blood pressure. Avoid additional CNS depressants.
What other medicines interact with Loxapine?
MediHelp also lists interactions of Loxapine with, for example, Alfentanil, Alprazolam, Amisulpride. The full list is on the Loxapine page.
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