Gabapentin and Morphine: Drug Interaction Guide

Quick answer: This combination requires caution. Gabapentin and Morphine can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Gabapentin interacts with Morphine

Gabapentin and morphine produce additive CNS depression; morphine also increases gabapentin bioavailability by approximately 44% via reduced gastrointestinal motility.

What you should do

Start with reduced doses of both, monitor for sedation and respiratory depression, especially in elderly or opioid-naive patients.

Key facts

Severity

Moderate — caution required

Mechanism

Gabapentin and morphine produce additive CNS depression; morphine also increases gabapentin bioavailability by approxima...

Action

Start with reduced doses of both, monitor for sedation and respiratory depression, especially in elderly or opioid-naive...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Gabapentin and Morphine together?

With caution. Start with reduced doses of both, monitor for sedation and respiratory depression, especially in elderly or opioid-naive patients.

What is the severity of this interaction?

The interaction between Gabapentin and Morphine is classified as Moderate — caution required. Gabapentin and morphine produce additive CNS depression; morphine also increases gabapentin bioavailability by approximately 44% via reduced gastrointestinal motility.

What should I do if I'm prescribed both?

Start with reduced doses of both, monitor for sedation and respiratory depression, especially in elderly or opioid-naive patients. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.