Epilim CR is a controlled-release valproate tablet used to control epilepsy and to stabilise mood in bipolar disorder. It is highly effective — and it causes serious birth defects and developmental problems, so it must not be used in pregnancy or by anyone who could become pregnant without strict precautions.
What is Epilim Cr?
Epilim CR contains sodium valproate / valproic acid in a controlled-release form, which releases the medicine steadily and allows less frequent dosing with smoother blood levels. It is a Schedule 4 medicine, also sold as Convulex and Valpro.
Valproate works in several ways at once: it increases GABA, the brain’s main calming signal, blocks sodium channels on nerve cells, and affects calcium channels. That broad action is why it is effective across more seizure types than most anticonvulsants.
It is one of the most effective epilepsy medicines available. For generalised epilepsies in particular, nothing else reliably matches it — which is precisely what makes the following section difficult, because the risks are equally serious.
What is Epilim Cr commonly used for?
- Epilepsy — generalised tonic-clonic, absence and myoclonic seizures, and some focal seizures. It is effective across a broader range of seizure types than most alternatives.
- Bipolar disorder, particularly for manic episodes and as a mood stabiliser.
- Migraine prevention, in some circumstances.
The pregnancy warning
This is the most important thing on this page, and it is not a routine caution.
Valproate taken in pregnancy causes serious harm. Around 1 in 10 babies exposed in the womb has a major birth defect — including spina bifida, heart, limb and facial malformations. Around 3 to 4 in 10 have developmental problems: delayed walking and talking, lower intellectual ability, poor memory, and a substantially raised risk of autism and ADHD. These risks are far higher than with other anticonvulsants.
Because of this, valproate must not be used in anyone who is pregnant or who could become pregnant, unless there is genuinely no effective alternative and a pregnancy prevention programme is in place. That means:
- Highly effective contraception, used consistently throughout treatment.
- An annual specialist review of whether valproate is still necessary.
- A signed risk acknowledgement form, so the risks have been explained and understood.
If you are taking valproate and could become pregnant, and no one has discussed this with you, raise it at your next appointment. It is a known gap in care.
But do not stop it on your own. Abruptly stopping an anticonvulsant can cause prolonged and dangerous seizures, which are themselves a serious risk in pregnancy. If you are pregnant or planning to be, contact your doctor urgently for a planned review — do not simply discontinue.
How Epilim Cr fits into this medicine category
| Group | Examples | Role |
|---|---|---|
| Broad-spectrum anticonvulsants | Valproate (Epilim CR), lamotrigine, levetiracetam | Generalised and focal epilepsy |
| Sodium channel blockers | Carbamazepine (Partid), phenytoin | Focal seizures; neuralgia |
| Gabapentinoids | Pregabalin (Lybet, Nurika) | Nerve pain, epilepsy, anxiety |
| Benzodiazepines | Clobazam (Urbanol), clonazepam (Rivotril) | Add-on in epilepsy |
| Mood stabilisers | Lithium, valproate | Bipolar disorder |
For women and girls, lamotrigine and levetiracetam are generally preferred where they control the seizures adequately. See the mental health and neurology medicines hub.
What to check before using Epilim Cr
If you could become pregnant, confirm you are on a pregnancy prevention programme — effective contraception, annual specialist review, and a documented discussion of the risks.
Swallow controlled-release tablets whole. Crushing or chewing destroys the release mechanism and delivers the whole amount at once.
Take it at the same times daily and never run out. Missed doses are a recognised cause of breakthrough seizures.
Tell your prescriber or pharmacist if you:
- Are pregnant, could become pregnant, or are planning a pregnancy. This needs urgent discussion, not a routine appointment.
- Have liver disease, or a family history of severe liver problems in childhood.
- Have a known or suspected mitochondrial disorder, particularly POLG mutations — valproate is contraindicated and can cause fatal liver failure.
- Have a urea cycle disorder.
- Have pancreatitis, or have had it.
- Have a bleeding disorder, or are due surgery — valproate affects platelets.
- Are breastfeeding.
- Take lamotrigine — valproate substantially raises its level and the risk of serious rash; warfarin; aspirin; carbapenem antibiotics, which drop valproate levels sharply.
Expect blood tests — liver function, full blood count, and sometimes valproate levels, particularly in the first six months.
Follow the dispensing label exactly. This page does not set doses.
Possible cautions and when to ask a pharmacist or doctor
Never stop abruptly. Withdrawal can trigger prolonged seizures. Any change is gradual and supervised.
Liver injury is rare but can be severe, and is most likely in the first six months and in young children. Seek urgent care for yellowing of the skin or eyes, dark urine, persistent vomiting, abdominal pain, unusual tiredness, or a sudden increase in seizures — that last one can be the first sign.
Pancreatitis is rare and serious: severe abdominal pain radiating to the back, with vomiting, needs emergency assessment.
Weight gain, hair thinning, tremor and drowsiness are common. Hair usually regrows.
Bruising or bleeding more easily should be reported.
In women, valproate is associated with polycystic ovary syndrome, menstrual irregularity and fertility effects — worth raising.
Mood changes and thoughts of self-harm are recognised with antiepileptic medicines and should be reported.
Seek urgent medical attention for yellowing of the skin or eyes, dark urine or persistent vomiting; severe abdominal pain radiating to the back; a sudden increase in seizure frequency; unusual bruising or bleeding; confusion or marked drowsiness; a rash that blisters or peels; or a positive pregnancy test.
Related medicine guides
Frequently asked questions
What is Epilim CR used for? Epilepsy — across a broad range of seizure types — and bipolar disorder as a mood stabiliser. It contains valproate.
What does “CR” mean? Controlled release. The tablet releases the medicine steadily, allowing less frequent dosing. Swallow it whole.
Can I take it if I might become pregnant? Only under a pregnancy prevention programme, and only where no effective alternative exists. Valproate causes birth defects in about 1 in 10 exposed babies and developmental problems in 3 to 4 in 10.
I have just found out I am pregnant. What should I do? Contact your doctor urgently — but do not stop the medicine on your own. Abruptly stopping can cause dangerous seizures, which also carry risk in pregnancy.
Why do I need blood tests? To monitor liver function and blood counts, particularly during the first six months.
Can I stop it if my seizures have stopped? No. Stopping abruptly can trigger prolonged seizures. Any change must be gradual and medically supervised.