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Drug Interactions between phenobarbital and Suboxone

This report displays the potential drug interactions for the following 2 drugs:

  • phenobarbital
  • Suboxone (buprenorphine/naloxone)

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Interactions between your drugs


PHENobarbital buprenorphine

Applies to: phenobarbital and Suboxone (buprenorphine / naloxone)

Due to their effects on the central nervous system, using buprenorphine together with PHENobarbital may occasionally lead to serious side effects such as respiratory distress, coma, or even death. In addition, PHENobarbital may reduce the blood levels of buprenorphine, which may make the medication less effective. If you have been receiving treatment with buprenorphine, adding PHENobarbital may also cause you to experience unpleasant withdrawal symptoms such as watery eyes, runny nose, sneezing, yawning, excessive sweating, goose bumps, fever, chills, flushing, restlessness, irritability, anxiety, depression, pupil dilation, tremor, rapid heart beat, body aches, involuntary twitching and kicking, abdominal cramping, loss of appetite, nausea, vomiting, diarrhea, and weight loss. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Make sure you take these medications exactly as prescribed to you, and avoid drinking alcohol during treatment. Also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medications affect you. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Drug and food interactions

No interactions were found. This does not necessarily mean no interactions exist. Always consult your healthcare provider.

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.