Skip to Content
Print Share

Drug Interactions between methadone and peginterferon alfa-2b

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

  • methadone
  • peginterferon alfa-2b

Edit list (add/remove drugs)

Interactions between your drugs

Moderate

methadone peginterferon alfa-2b

Applies to: methadone and peginterferon alfa-2b

Using methadone together with peginterferon alfa-2b may increase the effects of methadone. Contact your doctor if you experience dizziness, drowsiness, shallow breathing, hallucinations, confusion, fast or pounding heartbeats, chest pain, trouble breathing, feeling light-headed, or faint. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. 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.

Switch to professional interaction data

Drug and food interactions

Moderate

methadone food

Applies to: methadone

Grapefruit juice can increase the blood levels and effects of methadone. If you regularly consume grapefruits or grapefruit juice, you should be monitored for side effects and/or changes in methadone levels. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor. Orange juice is not expected to interact.

Switch to professional interaction data

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.

See Also

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.

Medical Disclaimer