Carbamazepine in Rett syndrome: brands, uses and side effects
Posted: Fri Sep 04, 2026 12:12 am
Generic medicine: CarbamazepineCommon brand names: Tegretol; Carbatrol and Equetro in the United States.
Brand names and formulations vary by country and should not be exchanged without professional advice.
How it may be used
Carbamazepine has been commonly used for focal-onset seizures in people with Rett syndrome. Rett cohort studies reported its use and possible effectiveness, but there are no high-quality trials proving that one medicine is best for everyone.
It can sometimes worsen absence or myoclonic seizures, so identifying the seizure type is important.
Common side effects
• Sleepiness, dizziness or unsteadiness
• Headache
• Feeling sick or vomiting
• Blurred or double vision
• Tiredness
• Dry mouth
Important risks and monitoring
• Serious skin reactions, including Stevens–Johnson syndrome
• Low sodium, which can cause confusion, worsening seizures or marked sleepiness
• Blood-cell disorders, with infection, bruising or bleeding
• Liver problems
• Numerous interactions with other medicines and hormonal contraception
Clinicians may monitor blood count, liver function, sodium and sometimes medicine levels. Genetic screening for serious rash risk may be advised for people with certain Asian ancestry.
Seek urgent medical advice for
A new rash, mouth sores, blistering or peeling skin, fever with swollen glands, jaundice, unusual infections, unexplained bruising, severe confusion or worsening seizures.
Important: Never stop carbamazepine suddenly. Ask a pharmacist before adding prescription, non-prescription or herbal products.
Rett-specific evidence: https://pubmed.ncbi.nlm.nih.gov/25814391/
Medicine information: https://www.nhs.uk/medicines/carbamazepine/
Information checked 4 September 2026. This is general information and not a complete side-effect list or treatment recommendation. Decisions belong with the neurology team.
Brand names and formulations vary by country and should not be exchanged without professional advice.
How it may be used
Carbamazepine has been commonly used for focal-onset seizures in people with Rett syndrome. Rett cohort studies reported its use and possible effectiveness, but there are no high-quality trials proving that one medicine is best for everyone.
It can sometimes worsen absence or myoclonic seizures, so identifying the seizure type is important.
Common side effects
• Sleepiness, dizziness or unsteadiness
• Headache
• Feeling sick or vomiting
• Blurred or double vision
• Tiredness
• Dry mouth
Important risks and monitoring
• Serious skin reactions, including Stevens–Johnson syndrome
• Low sodium, which can cause confusion, worsening seizures or marked sleepiness
• Blood-cell disorders, with infection, bruising or bleeding
• Liver problems
• Numerous interactions with other medicines and hormonal contraception
Clinicians may monitor blood count, liver function, sodium and sometimes medicine levels. Genetic screening for serious rash risk may be advised for people with certain Asian ancestry.
Seek urgent medical advice for
A new rash, mouth sores, blistering or peeling skin, fever with swollen glands, jaundice, unusual infections, unexplained bruising, severe confusion or worsening seizures.
Important: Never stop carbamazepine suddenly. Ask a pharmacist before adding prescription, non-prescription or herbal products.
Rett-specific evidence: https://pubmed.ncbi.nlm.nih.gov/25814391/
Medicine information: https://www.nhs.uk/medicines/carbamazepine/
Information checked 4 September 2026. This is general information and not a complete side-effect list or treatment recommendation. Decisions belong with the neurology team.