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Tegretol Withdrawal & Tapering Guide

carbamazepine

Mood StabilizerFDA 1968
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Boxed Warning

Serious dermatologic reactions (Stevens-Johnson syndrome / TEN) — especially in HLA-B*1502 positive individuals. Aplastic anemia and agranulocytosis.

In short

Tegretol (carbamazepine) is a Mood Stabilizer with a half-life of 25-65 hours initially; 8-17 hours with chronic dosing (autoinduction). Slow taper over weeks. Withdrawal symptoms, when they occur, usually begin 3-7 days after stopping and settle within 4-8 weeks. It is also sold as Carbatrol, Equetro, Epitol.

Class
Mood Stabilizer
Half-life
25-65 hours initially; 8-17 hours with chronic dosing (autoinduction)
Common doses
100mg, 200mg tablets; 100mg/5mL suspension; 100mg, 200mg, 400mg ER
Withdrawal onset
3-7 days after stopping
Typical resolution
4-8 weeks

Educational reference only. Dose changes are decided with the prescriber who knows your history.

Overview

Carbamazepine is an anticonvulsant used for bipolar (especially mania), epilepsy, and trigeminal neuralgia. Notable for autoinduction of its own metabolism and a black-box warning for serious skin reactions in HLA-B*1502-positive individuals.

Common Doses

100mg, 200mg tablets; 100mg/5mL suspension; 100mg, 200mg, 400mg ER

Formulations

Tablets: 200mg; Chewable tablets: 100mg; Suspension: 100mg/5mL; ER tablets: 100mg, 200mg, 400mg; ER capsules: 100mg, 200mg, 300mg

Pregnancy

Category D

Mechanism of Action

Voltage-gated sodium channel blocker; decreases neuronal excitability.

Taper Notes

Slow taper over weeks. Watch for return of induced enzyme drug interactions as carbamazepine clears.

Hyperbolic Tapering Guidance

Carbamazepine's enzyme induction means many concurrent drugs will need dose review during the taper as their metabolism slows.

Summary written by TaperCommunity, informed by the Maudsley Deprescribing Guidelines (Horowitz & Taylor) and related literature — see Sources & References below. Not affiliated with or endorsed by the Maudsley.

Withdrawal Timeline

⏱Onset

3-7 days after stopping

📈Peak Severity

1-2 weeks

📉Resolution

4-8 weeks

⚠️Protracted Risk

Mood instability can persist months without alternative coverage

Common Withdrawal Symptoms

rebound seizures (in seizure patients)mood instabilityanxietyinsomniaGI upset

Interactions & Safety

Drug Interactions

  • CYP3A4 substrates (oral contraceptives, warfarin, many psychotropics) — markedly reduced
  • CYP3A4 inhibitors (erythromycin, fluconazole, grapefruit) — increase carbamazepine levels
  • Lamotrigine — carbamazepine reduces lamotrigine levels

Contraindications

  • Bone marrow depression
  • Recent MAOI use
  • HLA-B*1502 positive without genotype confirmation in at-risk populations

Toxicity

Stevens-Johnson syndrome / TEN (especially HLA-B*1502 in Asian populations), aplastic anemia, agranulocytosis, hyponatremia (SIADH), hepatotoxicity, dizziness, ataxia, diplopia.

Pharmacokinetics

ADME Profile

Metabolism

Hepatic via CYP3A4 (major). Potent inducer of CYP3A4, CYP1A2, CYP2C9, UGT — induces own metabolism over the first weeks.

Protein Binding

~76%

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Other Drug Profiles

Lithium (carbonate / citrate)

lithium — Mood Stabilizer

Depakote

valproate / divalproex — Mood Stabilizer

Topamax

topiramate — Mood Stabilizer

Lexapro

escitalopram — SSRI

Frequently asked questions about Tegretol

What are the withdrawal symptoms of Tegretol (carbamazepine)?

Common withdrawal symptoms of Tegretol (carbamazepine) include: rebound seizures (in seizure patients), mood instability, anxiety, insomnia, GI upset. Symptom severity varies by individual, dose, and duration of use.

How should I taper off Tegretol (carbamazepine)?

Slow taper over weeks. Watch for return of induced enzyme drug interactions as carbamazepine clears. Carbamazepine's enzyme induction means many concurrent drugs will need dose review during the taper as their metabolism slows.

How long does Tegretol withdrawal last?

Tegretol withdrawal typically begins 3-7 days after stopping, peaks around 1-2 weeks, and resolves within 4-8 weeks. Mood instability can persist months without alternative coverage

Can I stop Tegretol cold turkey?

Stopping Tegretol abruptly is not recommended. Its half-life is 25-65 hours initially; 8-17 hours with chronic dosing (autoinduction), and the receptor adaptations built up during treatment do not reverse at that speed, so a sudden stop tends to produce the sharpest withdrawal. Prescribing guidance favours gradual, proportional reductions agreed with your prescriber.

How long does Tegretol stay in your system?

Tegretol (carbamazepine) has a half-life of 25-65 hours initially; 8-17 hours with chronic dosing (autoinduction). As a rule of thumb, a drug is mostly cleared after about five half-lives. Withdrawal symptoms often begin before the drug has fully cleared and continue after it has, because the adaptations the brain made during treatment reverse more slowly than the drug leaves the blood.

Sources & References

Tegretol (carbamazepine) information on this page is sourced from peer-reviewed research, regulatory bodies, clinical guidelines, and patient-advocacy organizations.

Encyclopedic & chemical databases

Neutral, high-authority entity references.

Regulatory sources

Official prescribing information and safety notices.

Clinical guidelines

Evidence-based deprescribing and prescribing standards.

Deprescribing-specific resources

Clinician-facing references on tapering protocols.

Patient-advocacy & lived-experience

Long-running communities documenting withdrawal experience.

TaperCommunity does not provide medical advice. Always consult a qualified prescriber before adjusting psychiatric medication.