Shortage status (as of mid‑2026)
- The FDA’s “Drug Shortages” database lists Tegretol® XR (carbamazepine extended‑release) as “In Shortage” for the United States.
- The manufacturer, Pfizer (in partnership with Mylan/Teva), has noted that the shortage is largely due to a combination of raw‑material constraints and packaging‑line issues that have slowed production of the 200 mg and 400 mg tablets.
- The shortage is ongoing and, at present, the FDA has not issued an official end‑date. The situation is monitored on a weekly basis.
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Why the shortage matters
| What it means | Impact on patients | Impact on prescribers |
|----------------|--------------------|-----------------------|
| Limited availability of the XR formulation | Patients may need to switch to a daily immediate‑release (IR) carbamazepine or another anticonvulsant. | Prescribers may have to fill orders with alternate medications or split doses of the IR formulation. |
| Potential price increases for the only available XR tablets | Out‑of‑network costs may rise; insurance coverage might be limited. | Prescribers may face higher drug‑claim costs and more paperwork for special‑use authorizations. |
| Risk of sub‑optimal seizure control if the drug is interrupted or replaced | Patients with well‑controlled epilepsy may experience breakthrough seizures if the new regimen isn’t optimized. | Requires close monitoring, dose adjustments, and possibly additional lab work. |
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How to find and obtain Tegretol® XR during a shortage
1. Check the FDA Shortage Database
- Visit https://www.accessdata.fda.gov/scripts/drugsafety/shortage/ and search for “Tegretol XR.”
- The entry includes the manufacturer’s name, expected duration, and any FDA actions.
2. Contact the Manufacturer
- Pfizer – Pharmaceutics, Inc.
- Phone: 1‑800‑463‑4779 (USA)
- Email: [email protected]
- They sometimes offer “prior‑authorization” programs for patients who need the XR formulation.
3. Ask Your Pharmacy
- Many community and hospital pharmacies keep a “pharmacy‑in‑stock” list.
- Inquire whether they have a regional distributor that can ship the XR tablets.
4. Explore “Alternative” Options
- Immediate‑Release Carbamazepine (Tegretol® IR):
- Can be taken 2–3 times daily, but may increase the risk of side effects due to higher peak concentrations.
- Some patients tolerate the split‑dose regimen well.
- Other Anticonvulsants (if seizure type permits):
- Lamotrigine, valproic acid, or levetiracetam.
- Each has its own therapeutic profile and monitoring requirements.
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Switching from XR to IR – What to Keep in Mind
| Consideration | Typical Approach | Monitoring Tips |
|---------------|------------------|-----------------|
| Dose conversion | 1:1 (e.g., 400 mg XR = 400 mg IR in one daily dose). | Verify that total daily dose remains the same. |
| Frequency | 2–3 times per day (e.g., 200 mg IR BID or 400 mg IR TID). | Watch for dizziness, nausea, or rash. |
| Titration | Start at ½–⅔ of the daily XR dose per intake. Increase slowly over 1–2 weeks. | Monitor serum carbamazepine levels if your clinician orders it. |
| Side‑effect profile | Higher peak levels → more vertigo, ataxia, and nausea. | Educate patients on “when to report” symptoms. |
| Blood‑pressure monitoring | Some patients develop a slight drop in BP with IR. | Check BP at each visit for the first month. |
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Practical Tips for Patients
- Keep a medication diary. Note doses, timing, and any side‑effects.
- Do not abruptly stop XR. Sudden discontinuation can precipitate seizures.
- Inform your prescriber about the shortage. They can request a “Special Drug Order” if you’re on an insurance plan that requires it.
- Ask for a “pharmacy‑direct” order if your insurer has a “preferred” pharmacy network; this can speed up delivery.
- Check for patient assistance programs. Pfizer’s “Patient Assistance Program” may provide the XR tablets at reduced cost or free of charge for qualifying patients.
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When to Contact a Specialist
- New or worsening seizures while on the IR formulation.
- Persistent side‑effects that seem intolerable.
- Uncertain about dose conversions or need for therapeutic drug monitoring.
- Insurance coverage issues that prevent you from getting the XR form.
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Bottom line
Tegretol® XR is currently short‑supply due to manufacturing constraints. You can:
- Check availability through the FDA database, manufacturer, and pharmacy.
- Switch to IR carbamazepine if the XR isn’t obtainable, but do so under prescriber guidance.
- Consider alternatives if the patient’s seizure type or comorbidities warrant it.
If you need help navigating the shortage, contact your prescriber or pharmacist—they can help you set up the best plan while you wait for the XR supply to normalize.