Drug interactions
Buprenorphine transdermal + Promethazine
Severity: Major
Buprenorphine transdermal and Promethazine: 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
The concurrent use of promethazine and buprenorphine transdermal may lead to increased sedation and a heightened risk of respiratory depression. Additionally, both medications can contribute to a decrease in the QTc interval, potentially leading to cardiac complications.
What this interaction means in plain words
Buprenorphine transdermal and Promethazine 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
Both drugs have sedative properties that can amplify each other's effects, increasing the risk of adverse outcomes. The mechanism by which they affect the QTc interval is not fully understood.
What to do
Patients receiving both medications should be closely monitored for signs of excessive sedation and respiratory depression. Consider alternative therapies if possible, especially in patients with pre-existing conditions that may be exacerbated by these effects.
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 Promethazine
- Cabergoline + Promethazine Contraindicated
- Dopamine + Promethazine Contraindicated
- Ibutilide + Promethazine Contraindicated
- Pimozide + Promethazine Contraindicated
- Promethazine + Thioridazine Contraindicated
- Alfentanil + Promethazine Major
Frequently asked questions
Can I take Buprenorphine transdermal with Promethazine?
MediHelp rates the interaction as major. Buprenorphine transdermal and Promethazine 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. The concurrent use of promethazine and buprenorphine transdermal may lead to increased sedation and a heightened risk of respiratory depression. Additionally, both medications can contribute to a decrease in the QTc interval, potentially leading to cardiac complications.
How serious is the interaction between Buprenorphine transdermal and Promethazine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Patients receiving both medications should be closely monitored for signs of excessive sedation and respiratory depression. Consider alternative therapies if possible, especially in patients with pre-existing conditions that may be exacerbated by these effects.
What other medicines interact with Promethazine?
MediHelp also lists interactions of Promethazine with, for example, Cabergoline, Dopamine, Ibutilide. The full list is on the Promethazine page.
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