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Does Lubiprostone Interact with Methadone?

Lubiprostone and Methadone have a moderate drug interaction according to U.S. FDA drug labeling data. Methadone may dose-dependently reduce lubiprostone activation of ClC-2 in the gastrointestinal tract, potentially decreasing lubiprostone efficacy for opioid-induced constipation. The mechanism involves dose-dependent reduction of clc-2 activation by lubiprostone in the gastrointestinal tract. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Moderate
Lubiprostone Class
Chloride Channel Activator
Management
Monitor for effects
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Lubiprostone and Methadone occurs because dose-dependent reduction of clc-2 activation by lubiprostone in the gastrointestinal tract. Clinically, this means methadone may dose-dependently reduce lubiprostone activation of clc-2 in the gastrointestinal tract, potentially decreasing lubiprostone efficacy for opioid-induced constipation. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.

What To Tell Your Doctor or Pharmacist

If you are taking Lubiprostone and your doctor is considering prescribing Methadone (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Lubiprostone(Amitiza)+💊 Methadone(Methadone Hydrochloride)

Severity & Interaction Details

🟡
moderate
Be aware — moderate interaction
Documented interaction with manageable risk. May require dose adjustment or monitoring.
Severity scale
MinorContra
On record
Yes
Drug A class
Chloride Channel Activator
Drug B class
—
Source
NLP:lubiprostone

What this means in plain English

Methadone may dose-dependently reduce lubiprostone activation of ClC-2 in the gastrointestinal tract, potentially decreasing lubiprostone efficacy for opioid-induced constipation.

About Lubiprostone and Methadone

Lubiprostone is a Chloride Channel Activator. Lubiprostone is also sold under the brand name Amitiza. Both medications are taken by mouth. Methadone additionally carries an FDA boxed warning, the FDA's strongest safety alert.

What the FDA label says

"Dose-dependent reduction of ClC-2 activation by lubiprostone in the gastrointestinal tract"

📖 Source: NLP:lubiprostone

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Data integrity: Every interaction shown is extracted directly from official U.S. FDA drug labeling via openFDA and the U.S. National Library of Medicine (NIH) — no interactions are invented, inferred, or manually edited. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.