Drug interactions
Carisoprodol + Fentanyl iontophoretic transdermal system
Severity: Major
Carisoprodol and Fentanyl iontophoretic transdermal system: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Fentanyl delivered by an iontophoretic system is a potent opioid, and carisoprodol adds CNS depression. The combination raises the risk of profound sedation and respiratory depression.
What this interaction means in plain words
Carisoprodol and Fentanyl iontophoretic transdermal system can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive CNS and respiratory depression.
What to do
Avoid unless alternatives are inadequate; use the lowest effective doses. Monitor for sedation and respiratory depression.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Carisoprodol and Fentanyl iontophoretic transdermal system, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
References
Other interactions of Carisoprodol
Frequently asked questions
Can I take Carisoprodol with Fentanyl iontophoretic transdermal system?
MediHelp rates the interaction as major. Carisoprodol and Fentanyl iontophoretic transdermal system can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Fentanyl delivered by an iontophoretic system is a potent opioid, and carisoprodol adds CNS depression. The combination raises the risk of profound sedation and respiratory depression.
How serious is the interaction between Carisoprodol and Fentanyl iontophoretic transdermal system?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid unless alternatives are inadequate; use the lowest effective doses. Monitor for sedation and respiratory depression.
What other medicines interact with Carisoprodol?
MediHelp also lists interactions of Carisoprodol with, for example, Alfentanil, Alprazolam, Amobarbital. The full list is on the Carisoprodol page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
