Phenobarbital is used to treat and prevent seizures.
Take phenobarbital regularly as directed with a glass of water.
Measure phenobarbital liquid carefully with an oral syringe or measuring spoon.
Take the missed dose as soon as possible and continue as directed.
Phenobarbital can react with many medicines, sometimes with severe results.
Tell your pharmacist or doctor about all medicines or treatments that you may be taking including vitamins, herbal products or recreational drugs.
|Side Effects||Recommended action|
Skin rash, skin peeling or blisters
|Stop taking and see your doctor immediately|
Slow or shallow breathing, hard to wake up
Reduced number of blood cells that fight infections or help your blood to clot - symptoms include: fever, chills, sore throat or generally feeling unwell, or easy or unusual bruising or bleeding
Symptoms of liver problems including: yellow skin or eyes, itching, dark urine, pale bowel motions, abdominal pain
|Tell your doctor immediately|
Agitation, confusion, loss of co-ordination/walking or handwriting problems, mood changes, slurred speech, trouble concentrating, unusual behaviour or thinking
Changes in vision
|Tell your doctor|
Dizziness, drowsiness, headache
|Tell your doctor if troublesome|
|Take with food|
If you notice any other effects, discuss them with your doctor or pharmacist.
This leaflet contains important, but not all, information about this medicine.
Prepared by the PILs Committee at Christchurch Hospital, Canterbury District Health Board, New Zealand. October 2020
For more general information about this sheet annd its contents, see: What does a My Medicines sheet cover?
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My Medicines Patient Information Leaflets (PILs) contain important, but not all, information about the medicines they describe.
For more information about the sheets, see: What does a My Medicines sheet cover?
My Medicines is developed by a team at the Canterbury District Health Board. Our team is made up of doctors, pharmacists, and a non-medical person to help us keep to plain language. We also discuss our information with specialist health professionals or groups when needed