Can You Take Celecoxib with CYCLOBENZAPRINE HYDROCHLORIDE?
A plain-English look at the major interaction between Celecoxib (Celebrex) and CYCLOBENZAPRINE HYDROCHLORIDE (CYCLOBENZAPRINE HYDROCHLORIDE) — what it means, why it happens, and what to talk to your doctor or pharmacist about.
Taking Celecoxib (Celebrex) with CYCLOBENZAPRINE HYDROCHLORIDE (CYCLOBENZAPRINE HYDROCHLORIDE) is a major drug interaction that should be avoided. Excessive sedation, respiratory depression, falls. Additive CNS depression. Both classes cause sedation and respiratory depression through complementary pathways.
Not sure about your specific combination? Check it in the Drug Interaction Checker →
Key Takeaways
- Interaction severity: Major
- Risk: Excessive sedation, respiratory depression, falls.
- Mechanism: Additive CNS depression. Both classes cause sedation and respiratory depression through complementary pathways.
- Celecoxib: S4 in Australia, low risk
- CYCLOBENZAPRINE HYDROCHLORIDE: S4 in Australia, low risk
- Claims action: Flag for immediate prescriber review. Document intervention in claim file.
Celecoxib vs CYCLOBENZAPRINE HYDROCHLORIDE at a Glance
| Property | Celecoxib | CYCLOBENZAPRINE HYDROCHLORIDE |
|---|---|---|
| Brand names | Celebrex, Celecoxib Sandoz, Celecoxib GH | CYCLOBENZAPRINE HYDROCHLORIDE |
| Drug class | opioid | muscle relaxant |
| Risk level | low | low |
| TGA Schedule (AU) | S4 | S4 |
Why Is This Combination Dangerous?
Additive CNS depression. Both classes cause sedation and respiratory depression through complementary pathways.
Regulatory Guidance by Jurisdiction
Australia TGA / SIRA / WorkSafe
The TGA and Australian Medicines Handbook classify this as a major drug interaction requiring immediate intervention.
United Kingdom NICE / MHRA / FPM
UK clinical guidelines recommend caution with this combination. For personal injury claims, the prescribing rationale should be documented and reviewed against NICE and FPM guidance.
United States FDA / CDC / State WC
The CDC and FDA recommend monitoring concurrent CNS depressant use. State workers compensation formularies may restrict or require prior authorization for this combination.
What Claims Professionals Should Do
- Flag immediately as a high-risk prescribing pattern in the claim file
- Request urgent prescriber review with documented clinical justification for the combination
- Consider an independent medical examination if the prescriber cannot provide adequate justification
- Assess work capacity impact as the combination significantly increases sedation and impairment risk
- Document all interventions for audit trail and compliance purposes
- Check Reasonable and Necessary status for both medications against the compensable injury
Clinical reference
A clinical summary of Celecoxib and CYCLOBENZAPRINE HYDROCHLORIDE drawn from regulator advisories, national guidelines, and authoritative drug references. Read this if you want the deeper clinical picture before talking to your prescriber or pharmacist.
Severity assessment
Minor. While no direct drug-drug interaction is formally recognized, there is a theoretical potential for additive central nervous system (CNS) side effects and gastrointestinal (GI) discomfort when these medications are co-administered.
Mechanism (plain English)
Celecoxib is a nonsteroidal anti-inflammatory drug (NSAID) that works by selectively blocking an enzyme called cyclooxygenase-2 (COX-2). This reduces the production of prostaglandins, which are chemicals in the body that cause pain and inflammation. Cyclobenzaprine is a muscle relaxant that acts on the central nervous system, primarily in the brainstem, to reduce muscle spasms. It has anticholinergic properties and can cause CNS depression. While their primary mechanisms of action are different, both drugs can cause side effects that might overlap or be additive. For instance, cyclobenzaprine commonly causes drowsiness and dizziness due to its CNS effects. Although celecoxib is not a primary CNS depressant, some NSAIDs can contribute to dizziness or fatigue. Additionally, celecoxib carries a risk of gastrointestinal side effects such as abdominal pain and dyspepsia, and while cyclobenzaprine's GI effects are less pronounced, constipation and nausea are reported, suggesting a potential for additive GI discomfort.
Evidence level
Theoretical. No specific regulator advisories or guidelines directly flag an interaction between celecoxib and cyclobenzaprine. The assessment is based on the known side effect profiles of each drug and the potential for additive effects, particularly CNS depression and gastrointestinal discomfort [1, 2].
Top regulator advisories (cite verbatim or close paraphrase)
- TGA (Australia): No pair-specific public advisory found. For celecoxib, the Australian Register of Therapeutic Goods (ARTG) entry for CELEBREX (celecoxib) capsules highlights warnings regarding serious cardiovascular thrombotic events and serious gastrointestinal adverse events, consistent with NSAID class effects [3]. For cyclobenzaprine, no specific product information or CMI for cyclobenzaprine was readily available from the TGA; however, general information on muscle relaxants would advise caution with CNS depressants.
- MHRA / NICE (UK): No specific guidance found for this drug pair. For celecoxib, MHRA guidance on COX-2 selective inhibitors and NSAIDs generally advises on cardiovascular safety and gastrointestinal risks [4]. For cyclobenzaprine, the BNF (British National Formulary) would advise caution with other CNS depressants due to enhanced sedative effects.
- FDA / CDC (US): No specific FDA advisory or communication directly addresses an interaction between celecoxib and cyclobenzaprine. The FDA label for CELEBREX (celecoxib) lists drug interactions with agents affecting hemostasis, ACE inhibitors, ARBs, beta-blockers, diuretics, and digoxin, but does not mention muscle relaxants or cyclobenzaprine [1]. The FDA label for AMRIX (cyclobenzaprine hydrochloride extended-release capsules) warns that it
Sources used in this brief (4)
- https://www.accessdata.fda.gov/drugsatfda_docs/label/2018/020998s050lbl.pdf
- https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/021777s017lbl.pdf
- https://www.tga.gov.au/resources/artg/67902
- https://www.gov.uk/government/publications/cox-2-selective-inhibitors-and-non-steroidal-anti-inflammatory-drugs-nsaids-cardiovascular-safety
Check this medication against your full medication list
Check all interactions for Celecoxib and CYCLOBENZAPRINE HYDROCHLORIDE across your claimant's full medication list.
Allmeds AI Pharmacist scans interactions, schedules, and risk flags across your entire medication profile in minutes. Free for individuals; team plans for case managers, insurers, and schemes.
Related Resources
Important: This page is general health information, not personal medical advice. If you have questions about your medication — including starting it, stopping it, changing the dose, or combining it with something else — speak with your doctor or pharmacist. For an emergency or suspected overdose, call your local emergency number or poison information service immediately. Information is drawn from regulator and clinical guideline sources (TGA, FDA, MHRA, NICE, PBS, CDC); see our methodology for details.