The MHRA recommend that patients on certain antiepileptic drugs remain on the same brand where possible. In order to help decide which anti-epileptics may or may not be switched the MHRA have classified anti-epileptics in to 3 categories.
Category 1 - the patient should be maintained on a specific manufacturer’s product (carbamazepine, phenobarbital and phenytoin)
Category 2 - the need for continued supply of a particular manufacturer’s product should be based on clinical judgement and consultation with patient and/or carer, taking into account factors such as seizure frequency and treatment history (clobazam, clonazepam, eslicarbazepine acetate, lamotrigine, oxcarbazepine, perampanel, retigabine, rufinamide, sodium valproate, topiramate, and zonisamide).
Category 3 - usually unnecessary to ensure that patients are maintained on a specific manufacturer’s product unless there are specific reasons such as patient anxiety and risk of confusion or dosing errors (acetazolamide, brivaracetam, ethosuximide, gabapentin, lacosamide, levetiracetam, pregabalin, stiripentol, and vigabatrin).
Cannabidiol Epidyolex® |
Formulary
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NICE TA614: Cannabidiol with clobazam for treating seizures associated with Dravet syndrome NICE TA615: Cannabidiol with clobazam for treating seizures associated with Lennox–Gastaut syndrome NICE TA873: Cannabidiol for treating seizures caused by tuberous sclerosis complex |
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Carbamazepine |
Formulary
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Clonazepam |
Formulary
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Fenfluramine Fintepla® |
Formulary
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Oral solution: 2.2mg/mL |
NICE TA808: Fenfluramine for treating seizures associated with Dravet syndrome |
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Gabapentin |
Formulary
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MHRA Drug Safety Alert (Oct 2017): Gabapentin (Neurontin): risk of severe respiratory depression |
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Lacosamide |
Formulary
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Perampanel |
Formulary
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NTAG - Perampanel (Fycompa®) for epilepsy |
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Phenytoin |
Formulary
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Pregabalin |
Formulary
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MHRA Drug Safety Update (Apr 2022): Pregabalin (Lyrica): findings of safety study on risks during pregnancy MHRA Drug Safety Update (Feb 2021): Pregabalin (Lyrica): reports of severe respiratory depression |
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Sodium Valproate |
Formulary
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▼ BLACK TRIANGLE IN FEMALES Valproate must no longer be prescribed to women and girls of For information relating to alerts regarding valproate, including Drug Safety Updates and links to PPP materials, please use the following link: |
Valproate medicines: Pregnancy Prevention Programme materials Local Shared Care guideline in TEWV to support Valproate Pregnancy Prevention Programme |
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Stiripentol |
Formulary
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Topiramate |
Formulary
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MHRA Drug Safety Update (June 2024): Topiramate (Topamax): introduction of new safety measures, including a Pregnancy Prevention Programme |
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Vigabatrin |
Formulary
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North of Tyne, Gateshead and North Cumbria - Vigabatrin Shared Care Guideline |
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Zonisamide |
Formulary
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