Drug interactions
Buprenorphine long-acting + Ethosuximide
Severity: Major
Buprenorphine long-acting and Ethosuximide: 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
Concurrent use of long-acting injectable buprenorphine with a CNS depressant such as ethosuximide increases the risk of sedation and respiratory depression. The depot effect means the opioid cannot be quickly withdrawn if problems occur.
What this interaction means in plain words
Buprenorphine long-acting and Ethosuximide 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.
What to do
Monitor for oversedation and respiratory depression, particularly after injection and with ethosuximide dose changes. Avoid additional sedatives and alcohol.
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 Ethosuximide
- Benzhydrocodone / acetaminophen + Ethosuximide Major
- Buprenorphine subdermal implant + Ethosuximide Major
- Buprenorphine transdermal + Ethosuximide Major
- Calcium / magnesium / potassium / sodium oxybates + Ethosuximide Major
- Ethosuximide + Fentanyl intranasal Major
- Ethosuximide + Fentanyl iontophoretic transdermal system Major
Frequently asked questions
Can I take Buprenorphine long-acting with Ethosuximide?
MediHelp rates the interaction as major. Buprenorphine long-acting and Ethosuximide 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. Concurrent use of long-acting injectable buprenorphine with a CNS depressant such as ethosuximide increases the risk of sedation and respiratory depression. The depot effect means the opioid cannot be quickly withdrawn if problems occur.
How serious is the interaction between Buprenorphine long-acting and Ethosuximide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for oversedation and respiratory depression, particularly after injection and with ethosuximide dose changes. Avoid additional sedatives and alcohol.
What other medicines interact with Ethosuximide?
MediHelp also lists interactions of Ethosuximide with, for example, Benzhydrocodone / acetaminophen, Buprenorphine subdermal implant, Buprenorphine transdermal. The full list is on the Ethosuximide page.
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