Metaxalone and Tapentadol Interaction
Drug interaction information between Metaxalone and Tapentadol.
Metaxalone and Tapentadol have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Metaxalone and Tapentadol. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Both of these medications can slow down your breathing and affect your brain's serotonin levels. Combining them makes these side effects more likely and more severe.
What To Do
Your healthcare provider should monitor you closely for signs of respiratory distress. Avoid this combination unless specifically directed by your doctor.
FDA Label Information
Examples: Selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs), tricyclic antidepressants (TCAs), triptans, 5-HT3 receptor antagonists, drugs that affect the serotonin neurotransmitter system (e.g., mirtazapine, trazodone, tramadol), certain muscle relaxants (i.e., cyclobenzaprine, metaxalone), monoamine oxidase inhibitors (those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene blue). Due to the risk of respiratory depression with concomitant use of skeletal muscle relaxants and...
Metaxalone Also Interacts With
- Trazodone minor
- Mirtazapine minor
- Linezolid minor
- Norepinephrine minor
- Acetaminophen/Oxycodone minor
Tapentadol Also Interacts With
- Cyclobenzaprine moderate
- Tranylcypromine moderate
- Gabapentin minor
- Trazodone minor
- Tramadol minor
Frequently Asked Questions
Can I take Metaxalone and Tapentadol together?
This is a moderate interaction. Your healthcare provider should monitor you closely for signs of respiratory distress. Avoid this combination unless specifically directed by your doctor.
How serious is the interaction between Metaxalone and Tapentadol?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Metaxalone and Tapentadol interact?
Both of these medications can slow down your breathing and affect your brain's serotonin levels. Combining them makes these side effects more likely and more severe.
Understanding the Metaxalone and Tapentadol Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Metaxalone belongs to the Muscle Relaxant class and Tapentadol belongs to the Opioid / Norepinephrine Reuptake Inhibitor class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Both of these medications can slow down your breathing and affect your brain's serotonin levels. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Metaxalone has 18 total documented interactions on file in this dataset, and Tapentadol has 16. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Your healthcare provider should monitor you closely for signs of respiratory distress. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Metaxalone or Tapentadol based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.