Primidone (By Mouth)

Primidone (PRI-mi-done)

Treats seizure disorders. Belongs to a class of drugs called anticonvulsants.

Brand Name(s):

Mysoline
There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not use this medicine if you have had a previous allergic reaction to primidone, or to any kind of barbiturate medicine such as phenobarbital.

How to Use This Medicine:

Tablet, Liquid

• Your doctor will tell you how much to take and how often.
• May be taken with food or milk to avoid stomach upset.
• Shake the oral liquid well before each dose. Carefully measure the dose with a marked measuring spoon.

If a dose is missed:

• Take the missed dose as soon as possible.
• If it is almost time for your next regular dose, wait until then to take your medicine and skip the missed dose.
• You should not use two doses at the same time, unless directed by your doctor.
• If you miss two or more doses, call your doctor.

How to Store and Dispose of This Medicine:

• Store at room temperature in a closed container, away from heat, light and moisture. Do not freeze.
• Keep all medicine out of the reach of children.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

• Avoid drinking alcohol.
• Make sure your doctor knows if you are taking birth control pills.

Warnings While Using This Medicine:

• Check with your doctor before taking primidone if you are pregnant or breastfeeding, or have liver or kidney disease.
• Because of the risk of increased seizures, do not suddenly stop taking this medicine without first checking with your doctor.
• This medicine may cause drowsiness. Be careful when driving or using dangerous machinery.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

• Loss of seizure control
• Severe skin rash
• Unexplained fever

If you notice these less serious side effects, talk with your doctor:

• Loss of appetite
• Nausea or vomiting
• Drowsiness or dizziness
• Loss of coordination

If you notice other side effects that you think are caused by this medicine, tell your doctor.